10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

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

FOR THE QUARTERLY PERIOD ENDED SEPTEMBER 30, 2023

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	001-38629

EQUITRANS MIDSTREAM CORPORATION

(Exact name of registrant as specified in its charter) 

Pennsylvania	83-0516635
(State or other jurisdiction of incorporation or organization)	(IRS Employer Identification No.)

2200 Energy Drive, Canonsburg, Pennsylvania     15317

(Address of principal executive offices)     (Zip code)

(724) 271-7600

(Registrant's telephone number, including area code)

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

Title of each class	Trading Symbol	Name of each exchange on which registered
Common Stock, no par value	ETRN	New York Stock Exchange

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.

Large Accelerated Filer	☒	Accelerated Filer	☐	Emerging Growth Company	☐
Non-Accelerated Filer	☐	Smaller Reporting Company	☐

If an emerging growth company, indicate by check mark 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 is a shell company (as defined in Rule 12b-2 of the Exchange Act).        Yes  ☐  No  ☒

The number of shares of common stock outstanding (in thousands), as of October 30, 2023: 433,261

EQUITRANS MIDSTREAM CORPORATION

Index

			Page No.
Glossary of Commonly Used Terms, Abbreviations and Measurements			3
Part I.	Financial Information:
Item 1.		Financial Statements (Unaudited):
		Statements of Consolidated Comprehensive Income for the Three and Nine Months Ended September 30, 2023 and 2022	5
		Statements of Consolidated Cash Flows for the Nine Months Ended September 30, 2023 and 2022	6
		Consolidated Balance Sheets as of September 30, 2023 and December 31, 2022	7
		Statements of Consolidated Equity and Mezzanine Equity for the Three and Nine Months Ended September 30, 2023 and 2022	8
		Notes to Consolidated Financial Statements	10
Item 2.		Management's Discussion and Analysis of Financial Condition and Results of Operations	20
Item 3.		Quantitative and Qualitative Disclosures About Market Risk	37
Item 4.		Controls and Procedures	39
Part II.	Other Information:
Item 1.		Legal Proceedings	40
Item 1A.		Risk Factors	44
Item 2.		Unregistered Sales of Equity Securities and Use of Proceeds	44
Item 5.		Other Information	44
Item 6.		Exhibits	45
Signature			47

2

EQUITRANS MIDSTREAM CORPORATION

Glossary of Commonly Used Terms, Abbreviations and Measurements

2021 Water Services Agreement – that certain mixed-use water services agreement entered into on October 22, 2021 by the Company and EQT (as defined below), as subsequently amended, which became effective on March 1, 2022.

Allowance for Funds Used During Construction (AFUDC) – carrying costs for the construction of certain long-lived regulated assets are capitalized and amortized over the related assets' estimated useful lives. The capitalized amount for construction of regulated assets includes interest cost and a designated cost of equity for financing the construction of these regulated assets.

Amended EQM Credit Facility – that certain Third Amended and Restated Credit Agreement, dated as of October 31, 2018, among EQM, as borrower, Wells Fargo Bank, National Association, as the administrative agent, swing line lender, and a letter of credit (L/C) issuer, the lenders party thereto from time to time and any other persons party thereto from time to time (as amended by that certain First Amendment to Third Amended and Restated Credit Agreement, dated as of March 30, 2020, by that certain Second Amendment to Third Amended and Restated Credit Agreement, dated April 16, 2021, by that certain Third Amendment to the Third Amended and Restated Credit Agreement, dated as of April 22, 2022, by that certain Fourth Amendment to Third Amended Restated Credit Agreement, dated as of October 6, 2023, and as may be further amended, restated, amended and restated, supplemented or otherwise modified from time to time). For the avoidance of doubt, any reference to the Amended EQM Credit Facility as of any particular date shall mean the Amended EQM Credit Facility as in effect on such date.

Annual Revenue Commitments (ARC or ARCs) – contractual term in a water services agreement that obligates the customer to pay for a fixed amount of water services annually.

Appalachian Basin – the area of the United States composed of those portions of West Virginia, Pennsylvania, Ohio, Maryland, Kentucky and Virginia that lie in the Appalachian Mountains.

British thermal unit – a measure of the amount of energy required to raise the temperature of one pound of water one-degree Fahrenheit.

delivery point – the point where gas is delivered into a downstream gathering system or transmission pipeline.

EQM – EQM Midstream Partners, LP and its subsidiaries. EQM is a wholly owned subsidiary of Equitrans Midstream Corporation.

EQT – EQT Corporation (NYSE: EQT) and its subsidiaries.

EQT Global GGA – that certain Gas Gathering and Compression Agreement entered into on February 26, 2020 (the EQT Global GGA Effective Date) by the Company with EQT and certain affiliates of EQT for the provision of certain gas gathering services to EQT in the Marcellus and Utica Shales of Pennsylvania and West Virginia, as subsequently amended.

Equitrans Midstream Preferred Shares –    the Equitrans Midstream Corporation Series A Perpetual Convertible Preferred Shares, no par value.

firm contracts – contracts for gathering, transmission, storage and water services that reserve an agreed upon amount of pipeline or storage capacity regardless of the capacity used by the customer during each month, and generally obligate the customer to pay a fixed, monthly charge.

firm reservation fee revenues – contractually obligated revenues that include fixed monthly charges under firm contracts and fixed volumetric charges under MVC (as defined below) and ARC (as defined above) contracts.

gas – natural gas.

liquefied natural gas (LNG) – natural gas that has been cooled to minus 161 degrees Celsius for transportation, typically by ship. The cooling process reduces the volume of natural gas by 600 times.

Minimum volume commitments (MVC or MVCs) – contracts for gathering or water services that obligate the customer to pay for a fixed amount of volumes daily, monthly, annually or over the life of the contract.

3

Mountain Valley Pipeline (MVP) – an estimated 300-mile, 42-inch diameter natural gas interstate pipeline with a targeted capacity of 2.0 Bcf per day that is designed to span from the Company's existing transmission and storage system in Wetzel County, West Virginia to Pittsylvania County, Virginia, providing access to the growing Southeast demand markets.

Mountain Valley Pipeline, LLC (MVP Joint Venture) – a joint venture formed among the Company and, as applicable, affiliates of each of NextEra Energy, Inc., Consolidated Edison, Inc. (Con Edison), AltaGas Ltd. and RGC Resources, Inc. (RGC) for purposes of the MVP and the MVP Southgate (as defined below) projects.

MVP Southgate – a contemplated interstate pipeline that was approved by the FERC to extend approximately 75 miles from the MVP at Pittsylvania County, Virginia to new delivery points in Rockingham and Alamance Counties, North Carolina. The MVP Joint Venture is continuing to engage with the project shipper, Dominion Energy North Carolina, and a prospective customer regarding the project as discussed in "MVP Southgate Project" in "Outlook" in Part I, "Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations" of this Quarterly Report on Form 10-Q.

natural gas liquids (NGLs) – those hydrocarbons in natural gas that are separated from the gas as liquids through the process of absorption, condensation, adsorption or other methods in gas processing plants. Natural gas liquids include ethane, propane, pentane, butane and iso-butane.

Preferred Interest – the preferred interest that the Company has in EQT Energy Supply, LLC (EES), a subsidiary of EQT.

Rager Mountain natural gas storage field incident – that certain venting of natural gas, of which the Company first became aware on November 6, 2022, at a storage well (well 2244) at Equitrans, L.P.'s Rager Mountain natural gas storage facility, located in Jackson Township, a remote section of Cambria County, Pennsylvania.

throughput – the volume of natural gas transported or passing through a pipeline, plant, terminal or other facility during a particular period.

wellhead – the equipment at the surface of a well used to control the well's pressure and the point at which the hydrocarbons and water exit the ground. 

Unless the context otherwise requires, a reference to a “Note” herein refers to the accompanying Notes to Consolidated Financial Statements contained in Part I, "Item 1. Financial Statements" of this Quarterly Report on Form 10-Q and all references to "we," "us," "our" and "the Company" refer to Equitrans Midstream Corporation and its subsidiaries.

Abbreviations	Measurements
ASC – Accounting Standards Codification	Btu = one British thermal unit
ASU – Accounting Standards Update	BBtu = billion British thermal units
EPA – United States Environmental Protection Agency	Bcf   = billion cubic feet
FASB – Financial Accounting Standards Board	Mcf = thousand cubic feet
FERC – United States Federal Energy Regulatory Commission	MMBtu = million British thermal units
GAAP – United States Generally Accepted Accounting Principles	MMcf  = million cubic feet
IRS – United States Internal Revenue Service	MMgal  = million gallons
NGA – Natural Gas Act of 1938, as amended
NYMEX – New York Mercantile Exchange
NYSE – New York Stock Exchange
PHMSA – Pipeline and Hazardous Materials Safety Administration of the United States Department of Transportation
SEC – United States Securities and Exchange Commission

4

PART I.  FINANCIAL INFORMATION

Item 1. Financial Statements

EQUITRANS MIDSTREAM CORPORATION

Statements of Consolidated Comprehensive Income (Unaudited)

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022 (a)		2023		2022 (a)
	(Thousands, except per share amounts)
Operating revenues	$	338,514	$	331,751	$	1,033,320	$	1,002,508
Operating expenses:
Operating and maintenance	43,046		35,297		131,675		100,820
Selling, general and administrative	55,627		33,348		145,181		92,074
Depreciation	69,348		68,572		208,783		203,272
Amortization of intangible assets	16,204		16,204		48,614		48,614
Total operating expenses	184,225		153,421		534,253		444,780
Operating income	154,289		178,330		499,067		557,728
Equity income (b)	73,810		48		97,618		91
Impairment of equity method investment	—		(583,057)		—		(583,057)
Other (expense) income, net	(3,037)		2,465		8,670		8,124
Loss on extinguishment of debt	—		—		—		(24,937)
Net interest expense	(106,334)		(101,085)		(314,935)		(289,323)
Income (loss) before income taxes	118,728		(503,299)		290,420		(331,374)
Income tax (benefit) expense	(10,976)		(366)		(14,295)		7,927
Net income (loss)	129,704		(502,933)		304,715		(339,301)
Net income attributable to noncontrolling interest	2,272		2,932		8,356		10,655
Net income (loss) attributable to Equitrans Midstream	127,432		(505,865)		296,359		(349,956)
Preferred dividends	14,628		14,628		43,884		43,884
Net income (loss) attributable to Equitrans Midstream common shareholders	$	112,804	$	(520,493)	$	252,475	$	(393,840)
Earnings (loss) per share of common stock attributable to Equitrans Midstream common shareholders - basic	$	0.26	$	(1.20)	$	0.58	$	(0.91)
Earnings (loss) per share of common stock attributable to Equitrans Midstream common shareholders - diluted	$	0.26	$	(1.20)	$	0.58	$	(0.91)
Weighted average common shares outstanding - basic	434,080		433,348		433,917		433,333
Weighted average common shares outstanding - diluted	439,034		433,348		435,658		433,333
Statement of comprehensive income (loss):
Net income (loss)	$	129,704	$	(502,933)	$	304,715	$	(339,301)
Other comprehensive income, net of tax:
Pension and other post-retirement benefits liability adjustment, net of tax expense of $7, $10, $21 and $34	22		36		66		104
Other comprehensive income	22		36		66		104
Comprehensive income (loss)	129,726		(502,897)		304,781		(339,197)
Less: Comprehensive income attributable to noncontrolling interest	2,272		2,932		8,356		10,655
Less: Comprehensive income attributable to preferred dividends	14,628		14,628		43,884		43,884
Comprehensive income (loss) attributable to Equitrans Midstream common shareholders	$	112,826	$	(520,457)	$	252,541	$	(393,736)
Dividends declared per common share	$	0.15	$	0.15	$	0.45	$	0.45

(a)Certain line items of the previously issued unaudited interim consolidated financial statements for the three and nine months ended September 30, 2022 have been revised. See Note 1 for more information.

(b)Represents equity income from Mountain Valley Pipeline, LLC (the MVP Joint Venture). See Note 4.

The accompanying notes are an integral part of these consolidated financial statements.

5

EQUITRANS MIDSTREAM CORPORATION

Statements of Consolidated Cash Flows (Unaudited)

	Nine Months Ended September 30,
	2023		2022 (a)
	(Thousands)
Cash flows from operating activities:
Net income (loss)	$	304,715	$	(339,301)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation	208,783		203,272
Amortization of intangible assets	48,614		48,614
Provision for credit losses on accounts receivable and contract asset write-down	10,234		—
Deferred income tax (benefit) expense	(20,832)		7,392
Impairment of equity method investment	—		583,057
Equity income (b)	(97,618)		(91)
Other income, net	(8,169)		(8,391)
Loss on extinguishment of debt	—		24,937
Non-cash long-term compensation expense	33,423		12,142
Changes in other assets and liabilities:
Accounts receivable	37,050		34,921
Accounts payable	(7,932)		2,255
Accrued interest	(44,310)		(57,375)
Deferred revenue	240,414		261,013
Other assets and other liabilities	20,488		(25,906)
Net cash provided by operating activities	724,860		746,539
Cash flows from investing activities:
Capital expenditures	(279,463)		(276,828)
Capital contributions to the MVP Joint Venture	(280,471)		(158,178)
Proceeds from sale of gathering assets	—		3,719
Principal payments received on the Preferred Interest	4,347		4,110
Net cash used in investing activities	(555,587)		(427,177)
Cash flows from financing activities:
Proceeds from revolving credit facility borrowings	627,000		284,500
Payments on revolving credit facility borrowings	(322,000)		(394,500)
Proceeds from the issuance of long-term debt	—		1,000,000
Debt discounts, debt issuance costs and credit facility arrangement fees	(60)		(19,880)
Payment for retirement of long-term debt	(98,941)		(1,021,459)
Dividends paid to holders of Equitrans Midstream Preferred Shares	(43,884)		(43,884)
Dividends paid to common shareholders	(194,930)		(194,733)
Distributions paid to noncontrolling interest	(22,440)		(16,000)
Other items	(1,307)		—
Net cash used in financing activities	(56,562)		(405,956)
Net change in cash and cash equivalents	112,711		(86,594)
Cash and cash equivalents at beginning of period	67,898		134,661
Cash and cash equivalents at end of period	$	180,609	$	48,067
Cash paid during the period for:
Interest, net of amount capitalized	$	354,962	$	339,285
Income taxes, net	$	4,505	$	1,243

(a)Certain line items of the previously issued unaudited interim consolidated financial statements for the nine months ended September 30, 2022 have been revised. See Note 1 for more information.

(b)Represents equity income from the MVP Joint Venture. See Note 4.

The accompanying notes are an integral part of these consolidated financial statements.

6

EQUITRANS MIDSTREAM CORPORATION

Consolidated Balance Sheets (Unaudited)

	September 30, 2023		December 31, 2022
	(Thousands)
ASSETS
Current assets:
Cash and cash equivalents	$	180,609	$	67,898
Accounts receivable (net of allowance for credit losses of $5,465 and $3,031 as of September 30, 2023 and December 31, 2022, respectively)	240,006		246,887
Other current assets	67,210		74,917
Total current assets	487,825		389,702
Property, plant and equipment	9,633,507		9,365,051
Less: accumulated depreciation	(1,684,025)		(1,480,720)
Net property, plant and equipment	7,949,482		7,884,331
Investments in unconsolidated entities (a)	1,290,996		819,743
Goodwill	486,698		486,698
Net intangible assets	538,338		586,952
Other assets	279,318		278,159
Total assets	$	11,032,657	$	10,445,585
LIABILITIES, MEZZANINE EQUITY AND SHAREHOLDERS' EQUITY
Current liabilities:
Current portion of long-term debt	$	299,616	$	98,830
Accounts payable	53,998		60,528
Capital contributions payable to the MVP Joint Venture	126,564		34,355
Accrued interest	91,452		135,762
Accrued liabilities	79,300		83,835
Total current liabilities	650,930		413,310
Long-term liabilities:
Revolving credit facility borrowings	840,000		535,000
Long-term debt	6,044,044		6,335,320
Contract liability	1,211,919		968,535
Regulatory and other long-term liabilities	131,370		112,974
Total liabilities	8,878,263		8,365,139
Mezzanine equity:
Equitrans Midstream Preferred Shares, 30,018 shares issued and outstanding as of September 30, 2023 and December 31, 2022	681,842		681,842
Shareholders' equity:
Common stock, no par value, 433,261 and 432,781 shares issued and outstanding as of September 30, 2023 and December 31, 2022, respectively	4,009,368		3,974,127
Retained deficit	(3,000,865)		(3,053,590)
Accumulated other comprehensive loss	(1,266)		(1,332)
Total common shareholders' equity	1,007,237		919,205
Noncontrolling interest	465,315		479,399
Total shareholders' equity	1,472,552		1,398,604
Total liabilities, mezzanine equity and shareholders' equity	$	11,032,657	$	10,445,585

(a)Represents investment in the MVP Joint Venture. See Note 4.

The accompanying notes are an integral part of these consolidated financial statements.

7

EQUITRANS MIDSTREAM CORPORATION

Statements of Consolidated Shareholders' Equity and Mezzanine Equity (Unaudited)

												Mezzanine
												Equity
						Accumulated						Equitrans
	Common Stock					Other						Midstream
	Shares	No		Retained		Comprehensive		Noncontrolling		Total		Preferred
	Outstanding	Par Value (a)		Deficit (a)		Loss		Interest		Equity (a)		Shares
	(Thousands, except per share amounts)
Balance at January 1, 2022	432,522	$	3,955,918	$	(2,464,573)	$	(2,054)	$	483,195	$	1,972,486	$	681,842
Other comprehensive income (net of tax):
Net income	—	—		80,490		—		3,775		84,265		14,628
Pension and other post-retirement benefits liability adjustment, net of tax expense of $12	—	—		—		34		—		34		—
Dividends on common shares ($0.15 per share)	—	—		(65,584)		—		—		(65,584)		—
Share-based compensation plans, net	155	4,670		—		—		—		4,670		—
Dividends paid to holders of Equitrans Midstream Preferred Shares ($0.4873 per share)	—	—		—		—		—		—		(14,628)
Balance at March 31, 2022	432,677	$	3,960,588	$	(2,449,667)	$	(2,020)	$	486,970	$	1,995,871	$	681,842
Other comprehensive income (net of tax):
Net income	—	—		46,163		—		3,948		50,111		14,628
Pension and other post-retirement benefits liability adjustment, net of tax expense of $12	—	—		—		34		—		34		—
Dividends on common shares ($0.15 per share)	—	—		(64,991)		—		—		(64,991)		—
Share-based compensation plans, net	104	4,470		—		—		—		4,470		—
Dividends paid to holders of Equitrans Midstream Preferred Shares ($0.4873 per share)	—	—		—		—		—		—		(14,628)
Balance at June 30, 2022	432,781	$	3,965,058	$	(2,468,495)	$	(1,986)	$	490,918	$	1,985,495	$	681,842
Other comprehensive income (net of tax):
Net (loss) income	—	—		(520,493)		—		2,932		(517,561)		14,628
Pension and other post-retirement benefits liability adjustment, net of tax expense of $10	—	—		—		36		—		36		—
Dividends on common shares ($0.15 per share)	—	—		(65,681)		—		—		(65,681)		—
Share-based compensation plans, net	—	4,533		—		—		—		4,533		—
Distributions paid to noncontrolling interest in Eureka Midstream Holdings, LLC	—	—		—		—		(16,000)		(16,000)		—
Dividends paid to holders of Equitrans Midstream Preferred Shares ($0.4873 per share)	—	—		—		—		—		—		(14,628)
Balance at September 30, 2022	432,781	$	3,969,591	$	(3,054,669)	$	(1,950)	$	477,850	$	1,390,822	$	681,842

(a)Certain line items of the previously issued unaudited interim consolidated financial statements for the three and nine months ended September 30, 2022 have been revised. See Note 1 for more information.

8

												Mezzanine
												Equity
						Accumulated						Equitrans
	Common Stock					Other						Midstream
	Shares	No		Retained		Comprehensive		Noncontrolling		Total		Preferred
	Outstanding	Par Value		Deficit		Loss		Interest		Equity		Shares
	(Thousands, except per share amounts)
Balance at January 1, 2023	432,781	$	3,974,127	$	(3,053,590)	$	(1,332)	$	479,399	$	1,398,604	$	681,842
Other comprehensive income (net of tax):
Net income	—	—		87,054		—		4,409		91,463		14,628
Pension and other post-retirement benefits liability adjustment, net of tax expense of $7	—	—		—		22		—		22		—
Dividends on common shares ($0.15 per share)	—	—		(65,121)		—		—		(65,121)		—
Share-based compensation plans, net	402	3,050		—		—		—		3,050		—
Distributions paid to noncontrolling interest in Eureka Midstream Holdings, LLC	—	—		—		—		(8,000)		(8,000)		—
Dividends paid to holders of Equitrans Midstream Preferred Shares ($0.4873 per share)	—	—		—		—		—		—		(14,628)
Balance at March 31, 2023	433,183	$	3,977,177	$	(3,031,657)	$	(1,310)	$	475,808	$	1,420,018	$	681,842
Other comprehensive income (net of tax):
Net income	—	—		52,617		—		1,675		54,292		14,628
Pension and other post-retirement benefits liability adjustment, net of tax expense of $7	—	—		—		22		—		22		—
Dividends on common shares ($0.15 per share)	—	—		(68,227)		—		—		(68,227)		—
Share-based compensation plans, net	78	23,853		—		—		—		23,853		—
Distributions paid to noncontrolling interest in Eureka Midstream Holdings, LLC	—	—		—		—		(12,000)		(12,000)		—
Dividends paid to holders of Equitrans Midstream Preferred Shares ($0.4873 per share)	—	—		—		—		—		—		(14,628)
Balance at June 30, 2023	433,261	$	4,001,030	$	(3,047,267)	$	(1,288)	$	465,483	$	1,417,958	$	681,842
Other comprehensive income (net of tax):
Net income	—	—		112,804		—		2,272		115,076		14,628
Pension and other post-retirement benefits liability adjustment, net of tax expense of $7	—	—		—		22		—		22		—
Dividends on common shares ($0.15 per share)	—	—		(66,402)		—		—		(66,402)		—
Share-based compensation plans, net	—	8,338		—		—		—		8,338		—
Distributions paid to noncontrolling interest in Eureka Midstream Holdings, LLC	—	—		—		—		(2,440)		(2,440)		—
Dividends paid to holders of Equitrans Midstream Preferred Shares ($0.4873 per share)	—	—		—		—		—		—		(14,628)
Balance at September 30, 2023	433,261	$	4,009,368	$	(3,000,865)	$	(1,266)	$	465,315	$	1,472,552	$	681,842

The accompanying notes are an integral part of these consolidated financial statements.

9

EQUITRANS MIDSTREAM CORPORATION

Notes to Consolidated Financial Statements (Unaudited)

1.    Financial Statements

Nature of Business. The Company's operating subsidiaries provide midstream services to the Company's customers in Pennsylvania, West Virginia and Ohio through three primary assets: the gathering system, which includes predominantly dry gas gathering systems of high-pressure gathering lines; the transmission system, which includes FERC-regulated interstate pipelines and storage systems; and the water network, which primarily consists of water pipelines and other facilities that support well completion activities and produced water handling activities.

Basis of Presentation. References in these financial statements to Equitrans Midstream or the Company refer collectively to Equitrans Midstream Corporation and its consolidated subsidiaries for all periods presented, unless otherwise indicated.

The accompanying unaudited consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States (GAAP) for interim financial information and with the requirements of Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, these unaudited consolidated financial statements include all adjustments (consisting of only normal, recurring adjustments, unless otherwise disclosed in this Quarterly Report on Form 10-Q) necessary for a fair presentation of the financial position of the Company as of September 30, 2023, the results of its operations and equity for the three and nine months ended September 30, 2023 and 2022 and its cash flows for the nine months ended September 30, 2023 and 2022. The consolidated balance sheet at December 31, 2022 has been derived from the audited financial statements at that date, but does not include all of the information and notes required by GAAP for complete financial statements. This Quarterly Report on Form 10-Q should be read in conjunction with the Company's Annual Report on Form 10-K for the year ended December 31, 2022, which includes all disclosures required by GAAP.

Due to, among other things, the seasonal nature of the Company's utility customer contracts, as well as producers’ well completion activities and varying needs for fresh and produced water (which are primarily driven by horizontal lateral lengths and the number of completion stages per well), the interim statements for the three and nine months ended September 30, 2023 are not necessarily indicative of the results that may be expected for the year ending December 31, 2023.

For further information, refer to the Company's consolidated financial statements and related notes in the Company's Annual Report on Form 10-K for the year ended December 31, 2022, as well as Part I, "Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations" contained herein.

Revisions of Previously Issued Financial Statements.

In the course of its 2022 year-end process, the Company identified certain corrections in its previously issued unaudited interim consolidated financial statements primarily related to the accounting for the Henry Hub cash bonus payment provision (as defined in Note 7). In accordance with Staff Accounting Bulletin (SAB) No. 99, Materiality, and SAB No. 108, Considering the Effects of Prior Year Misstatements when Quantifying Misstatements in Current Year Financial Statements, the Company evaluated the corrections and, based on its analysis of quantitative and qualitative factors, determined that the related impact was not material to the Company's affected unaudited interim consolidated financial statements presented within this Quarterly Report on Form 10-Q. The Company has made the appropriate revisions to its previously issued interim consolidated financial statements in order to correct the Henry Hub cash bonus payment provision, and also made other immaterial revisions to its nine months ended September 30, 2022 unaudited interim consolidated financial statements. For more information, see Notes 1 and 16 to the consolidated financial statements in the Company's Annual Report on Form 10-K for the year ended December 31, 2022.

Recently Issued Accounting Standards.

In March 2020, the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848), which provides practical expedients for contract modifications and certain hedging relationships associated with the transition from reference rates that are expected to be discontinued. This guidance is applicable to the calculation of each dividend following March 31, 2024 for the Equitrans Midstream Preferred Shares pursuant to the Company's Second Amended and Restated Articles of Incorporation, as well as any Company contracts that use the London Inter-Bank Offered Rate as a reference rate. In December 2022, the FASB also issued ASU 2022-06, which amended Topic 848 to defer the sunset date to apply the practical expedients until December 31, 2024. The Company adopted this standard on April 1, 2023 and it had no impact on the Company's financial statements and related disclosures.

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2.    Financial Information by Business Segment

The Company reports its operations in three segments that reflect its three lines of business of Gathering, Transmission and Water, which reflects the manner in which management evaluates the business for making operating decisions and assessing performance.

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
	(Thousands)
Revenues from customers:
Gathering	$	220,087	$	227,180	$	641,033	$	672,284
Transmission	98,575		91,557		330,021		293,430
Water	19,852		13,014		62,266		36,794
Total operating revenues	$	338,514	$	331,751	$	1,033,320	$	1,002,508
Operating income (loss):
Gathering	$	101,134	$	112,279	$	286,448	$	345,695
Transmission	55,808		64,077		203,181		209,480
Water	(2,251)		2,342		10,652		3,537
Headquarters (a)	(402)		(368)		(1,214)		(984)
Total operating income	$	154,289	$	178,330	$	499,067	$	557,728
Reconciliation of operating income to net income (loss):
Equity income (b)	$	73,810	$	48	$	97,618	$	91
Impairment of equity method investment (b)	—		(583,057)		—		(583,057)
Other (expense) income, net (c)	(3,037)		2,465		8,670		8,124
Loss on extinguishment of debt	—		—		—		(24,937)
Net interest expense	(106,334)		(101,085)		(314,935)		(289,323)
Income tax (benefit) expense	(10,976)		(366)		(14,295)		7,927
Net income (loss)	$	129,704	$	(502,933)	$	304,715	$	(339,301)

(a)Includes certain unallocated corporate expenses.

(b)Equity income and impairment of equity method investment are included in the Transmission segment.

(c)Includes unrealized (loss) gain on derivative instruments recorded in the Gathering segment.

	September 30, 2023		December 31, 2022
	(Thousands)
Segment assets:
Gathering	$	7,605,477	$	7,610,233
Transmission (a)	2,808,259		2,333,896
Water	209,967		218,680
Total operating segments	10,623,703		10,162,809
Headquarters, including cash	408,954		282,776
Total assets	$	11,032,657	$	10,445,585

(a)The equity method investment in the MVP Joint Venture is included in the Transmission segment.

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	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
	(Thousands)
Depreciation:
Gathering	$	48,585	$	49,125	$	147,321	$	145,953
Transmission	14,004		13,909		41,796		41,707
Water	6,655		5,162		19,029		14,483
Headquarters	104		376		637		1,129
Total	$	69,348	$	68,572	$	208,783	$	203,272
Capital expenditures:
Gathering (a)	$	67,551	$	73,589	$	199,157	$	195,925
Transmission (b)	31,332		12,429		54,896		22,994
Water	9,574		17,041		31,798		49,132
Headquarters	—		—		—		13
Total (c)	$	108,457	$	103,059	$	285,851	$	268,064

(a)Includes capital expenditures related to the noncontrolling interest in Eureka Midstream Holdings, LLC (Eureka Midstream) of approximately $3.3 million and $11.5 million for the three and nine months ended September 30, 2023, respectively, and approximately $5.9 million and $17.6 million for the three and nine months ended September 30, 2022, respectively.

(b)Transmission capital expenditures do not include aggregate capital contributions made to the MVP Joint Venture for the MVP and MVP Southgate projects of approximately $209.9 million and $280.5 million for the three and nine months ended September 30, 2023, respectively, and approximately $46.4 million and $158.2 million for the three and nine months ended September 30, 2022, respectively.

(c)The Company accrues capital expenditures when the work has been completed but the associated bills have not yet been paid. Accrued capital expenditures are excluded from the statements of consolidated cash flows until they are paid. The net impact of non-cash capital expenditures, including the effect of accrued capital expenditures, transfers to/from inventory as assets are completed/assigned to a project and capitalized share-based compensation costs were $(0.9) million and $(6.4) million for the three and nine months ended September 30, 2023, respectively, and $10.7 million and $8.8 million for the three and nine months ended September 30, 2022, respectively.

3.    Revenue from Contracts with Customers

For the three and nine months ended September 30, 2023 and 2022, substantially all revenues recognized on the Company's statements of consolidated comprehensive income were from contracts with customers. As of September 30, 2023 and December 31, 2022, all receivables recorded on the Company's consolidated balance sheets represented performance obligations that have been satisfied and for which an unconditional right to consideration exists.

Summary of disaggregated revenues. The tables below provide disaggregated revenue information by business segment.

	Three Months Ended September 30, 2023
	Gathering		Transmission		Water		Total
	(Thousands)
Firm reservation fee revenues (a)	$	147,137	$	82,508	$	11,029	$	240,674
Volumetric-based fee revenues	72,950		16,067		8,823		97,840
Total operating revenues	$	220,087	$	98,575	$	19,852	$	338,514
	Three Months Ended September 30, 2022
	Gathering		Transmission		Water		Total
	(Thousands)
Firm reservation fee revenues (a)	$	144,730	$	84,584	$	9,375	$	238,689
Volumetric-based fee revenues	82,450		6,973		3,639		93,062
Total operating revenues	$	227,180	$	91,557	$	13,014	$	331,751

	Nine Months Ended September 30, 2023
	Gathering		Transmission		Water		Total
	(Thousands)
Firm reservation fee revenues (a)	$	428,945	$	266,477	$	29,793	$	725,215
Volumetric-based fee revenues (b)	212,088		63,544		32,473		308,105
Total operating revenues	$	641,033	$	330,021	$	62,266	$	1,033,320
	Nine Months Ended September 30, 2022
	Gathering		Transmission		Water		Total
	(Thousands)
Firm reservation fee revenues (a)	$	415,932	$	272,129	$	24,502	$	712,563
Volumetric-based fee revenues	256,352		21,301		12,292		289,945
Total operating revenues	$	672,284	$	293,430	$	36,794	$	1,002,508

(a) Firm reservation fee revenues associated with Gathering included MVC unbilled revenues of approximately $1.8 million and $7.5 million for the three and nine months ended September 30, 2023, respectively, and $8.5 million and $17.4 million for the three and nine months ended September 30, 2022, respectively.

(b) For the nine months ended September 30, 2023, volumetric-based fee revenues associated with Gathering and Transmission included one-time contract buyouts by a customer for approximately $5.0 million and $23.8 million, respectively.

Contract assets. The Company's contract assets related to the Company's future MVC deficiency payments are generally expected to be collected within the next twelve months and are primarily included in other current assets in the Company's consolidated balance sheets until such time as the MVC deficiency payments are invoiced to the customer.

The following table presents changes in the Company's unbilled revenue balance:

	Nine Months Ended September 30,
	2023		2022
	(Thousands)
Balance as of beginning of period	$	27,493	$	16,772
Revenue recognized in excess of amounts invoiced (a)	7,530		19,436
Minimum volume commitments invoiced (b)	(23,558)		(14,884)
Amortization (c)	(494)		(334)
Balance as of end of period	$	10,971	$	20,990

(a)Primarily includes revenues associated with MVCs that are generally included in firm reservation fee revenues within the Gathering and Water segments.

(b)Unbilled revenues are transferred to accounts receivable once the Company has an unconditional right to consideration from the customer.

(c)Amortization of capitalized contract costs paid to customers over the expected life of the agreement.

Contract liabilities. The Company's contract liabilities consist of deferred revenue primarily associated with the EQT Global GGA. Contract liabilities are classified as current or non-current according to when such amounts are expected to be recognized.

On July 8, 2022, the Company received written notice from EQT, pursuant to the EQT Global GGA, of EQT’s irrevocable election under the agreement to forgo up to approximately $145 million of potential gathering fee relief in the first twelve-month period beginning the first day of the quarter in which the MVP full in-service date occurs and up to approximately $90 million of potential gathering fee relief in the second such twelve-month period in exchange for a cash payment from the Company to EQT in the amount of approximately $195.8 million (the EQT Cash Option). As a result of EQT’s election to forgo potential rate relief in exchange for the cash option payment, the Company recorded a reduction to the contract liability of approximately $195.8 million and an increase to the EQT Cash Option liability on the consolidated balance sheets as of September 30, 2022. The Company utilized borrowings under the Amended EQM Credit Facility to effect such payment and the payment was made to EQT on October 4, 2022.

The following table presents changes in the Company's contract liability balances:

	Nine Months Ended September 30,
	2023		2022
	(Thousands)
Balance as of beginning of period	$	973,087	$	822,416
Amounts recorded during the period (a)	250,061		266,792
Change in estimated variable consideration (b)	(5,330)		(4,837)
Amounts transferred during the period (c)	(4,317)		(942)
EQT Cash Option	—		(195,820)
Balance as of end of period	$	1,213,501	$	887,609

(a)Includes deferred billed revenue during the nine months ended September 30, 2023 and 2022 primarily associated with the EQT Global GGA.

(b)For the nine months ended September 30, 2023, the change in estimated variable consideration represents the decrease in total deferred revenue due to changes in MVP timing assumptions. For the nine months ended September 30, 2022, the change in estimated variable consideration represents the decrease in total deferred revenue required for gathering MVC revenue with a declining rate structure, resulting from the EQT Cash Option election that required total estimated gathering consideration to be increased.

(c)Deferred revenues are recognized as revenue upon satisfaction of the Company's performance obligation to the customer.

Summary of remaining performance obligations. The following table summarizes the estimated transaction price allocated to the Company's remaining performance obligations under all contracts with firm reservation fees, MVCs and/or ARCs as of September 30, 2023 that the Company will invoice or transfer from contract liabilities and recognize in future periods.

		2023(a)		2024		2025		2026		2027		Thereafter		Total
	(Thousands)
Gathering firm reservation fees		$	25,390	$	156,078	$	177,127	$	167,692	$	161,018	$	1,726,068	$	2,413,373
Gathering revenues supported by MVCs		114,809		427,169		456,995		489,335		487,366		3,169,121		5,144,795
Transmission firm reservation fees		94,184		394,879		394,766		393,300		394,490		3,149,178		4,820,797
Water revenues supported by ARCs		9,375		45,706		48,441		45,159		44,065		166,644		359,390
Total (b)		$	243,758	$	1,023,832	$	1,077,329	$	1,095,486	$	1,086,939	$	8,211,011	$	12,738,355

(a)    October 1, 2023 through December 31, 2023.

(b)    Includes assumptions regarding timing for placing certain projects in-service. Such assumptions may not be realized and delays in the in-service dates for projects have substantially altered, and any future additional delays may further substantially alter, the remaining performance obligations for certain contracts with firm reservation fees, MVCs and/or ARCs. The MVP Joint Venture is accounted for as an equity method investment and those amounts are not included in the table above.

Based on total projected contractual revenues, including projected contractual revenues from future capacity expected from expansion projects that are not yet fully constructed or not yet fully in-service for which the Company has executed firm contracts, the Company's firm gathering contracts and firm transmission and storage contracts had weighted average remaining terms of approximately 13 years and 11 years, respectively, as of September 30, 2023.

4.    Investment in Unconsolidated Entities

Mountain Valley Pipeline. The MVP Joint Venture is constructing the Mountain Valley Pipeline (MVP), an estimated 300-mile natural gas interstate pipeline that is designed to span from northern West Virginia to southern Virginia. The Company will operate the MVP and owned a 47.7% interest in the MVP project as of September 30, 2023. On November 4, 2019, Consolidated Edison, Inc. (Con Edison) exercised an option to cap its investment in the construction of the MVP project at approximately $530 million (excluding AFUDC). On May 4, 2023, RGC Resources, Inc. (RGC) also exercised an option for the Company to fund RGC's portion of future capital contributions with respect to the MVP project, which funding the Company commenced in June 2023 and will continue through the full in-service date of the MVP. The Company and NextEra Energy, Inc. are obligated to, and RGC prior to the exercise of its option described above had opted to, fund the shortfall in Con Edison's capital contributions, on a pro rata basis. Following RGC's exercise of its option, the Company is also funding RGC's portion of Con Edison's shortfall. Such funding by the Company in respect of the Con Edison shortfall and RGC's portion of capital contributions has and will correspondingly increase the Company's interests in the MVP project and decrease Con Edison's and RGC's respective interests, as applicable, in the MVP project.

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On June 3, 2023, the President of the United States signed into law the Fiscal Responsibility Act of 2023 that, among other things, ratified and approved all permits and authorizations necessary for the construction and initial operation of the MVP, directed the applicable federal officials and agencies to maintain such authorizations, required the Secretary of the Army to issue not later than June 24, 2023 all permits or verifications necessary to complete construction of the MVP and allow for the MVP’s operation and maintenance, and divested courts of jurisdiction to review agency actions on approvals necessary for MVP construction and initial operation. Following enactment of the Fiscal Responsibility Act of 2023, the Fourth Circuit issued a stay halting MVP project construction in the Jefferson National Forest and a stay of the new Biological Opinion and Incidental Take Statement for the MVP project effectively halting forward construction for the entirety of the project, on July 10, 2023 and July 11, 2023, respectively. The MVP Joint Venture subsequently filed an emergency application to vacate the stays with the U.S. Supreme Court and the U.S. Supreme Court vacated the stays on July 27, 2023. Accordingly, the MVP Joint Venture recommenced forward construction.

On October 18, 2023, the Company announced that following the MVP Joint Venture's comprehensive review of progress achieved since the resumption of forward construction in August 2023 and construction activity remaining for completion of the MVP project, the MVP Joint Venture refined the targeted timing for completing construction of the project from year-end 2023 to the first quarter of 2024, with the total project cost anticipated to be approximately $7.2 billion (excluding AFUDC), which includes approximately $120 million of contingency. Based on such targeted completion timing and following in-service authorization from the FERC, contractual obligations accordingly would commence on or before April 1, 2024. If the project were to be completed in the first quarter of 2024 and at a total project cost of approximately $7.2 billion (excluding AFUDC), the Company expects its equity ownership in the MVP project would progressively increase from approximately 47.7% to approximately 48.8%.

The MVP Joint Venture is a variable interest entity because it has insufficient equity to finance its activities during the construction stage of the project. The Company is not the primary beneficiary of the MVP Joint Venture because the Company does not have the power to direct the activities that most significantly affect the MVP Joint Venture's economic performance. Certain business decisions, such as decisions to make distributions of cash, require a greater than 66 2/3% ownership interest approval, and no one member owns more than a 66 2/3% interest.

The Company reviews the carrying value of its investments in unconsolidated entities for impairment whenever events or changes in circumstances indicate that the fair value may have declined in value. In connection with its assessment as of September 30, 2022, the Company identified an increased risk of one or more permitting delays resulting primarily from then recent legal developments and regulatory uncertainties, as well as macroeconomic pressures primarily due to increased interest rates that impacted the discount rate used within the estimated fair value of its investment in the MVP Joint Venture. The Company considered these factors to be indicators of a decline in value. As such, the Company evaluated if the carrying value of its equity method investment in the MVP Joint Venture as of September 30, 2022 exceeded the fair value and, if so, whether that decline in value was other-than-temporary.

The Company estimated the fair value of its investment in the MVP Joint Venture using an income approach that primarily considered revised probability-weighted scenarios of discounted future net cash flows based on the estimates of total project costs and revenues. These scenarios reflected assumptions and judgments regarding potential delays and cost increases resulting from various then ongoing legal and regulatory matters affecting the MVP and MVP Southgate projects. The Company’s analysis also took into account, among other things, probability-weighted growth expectations from additional compression expansion opportunities. The Company generally used an after-tax discount rate of 7.5% in the analysis derived based on a market participant approach. The Company considered scenarios under which then ongoing or new legal and regulatory matters could further delay the completion and increase the total costs of the project; all required legal and regulatory approvals and authorizations and certain compression expansion opportunities are realized; and the MVP project is canceled. As a result of the assessment, the Company recognized a pre-tax impairment charge of approximately $583 million that reduced the carrying value of its equity investment in the MVP Joint Venture to approximately $784 million as of September 30, 2022. Given the significant assumptions and judgments used in estimating the fair value of the Company's investment in the MVP Joint Venture, the fair value of the investment in the MVP Joint Venture represented a Level 3 measurement.

In September 2023, the MVP Joint Venture issued a capital call notice for the funding of the MVP project to MVP Holdco, LLC (MVP Holdco), a wholly owned subsidiary of the Company, for $126.3 million, which was paid in October 2023. In October 2023, the MVP Joint Venture issued a capital call notice for the funding of the MVP project to MVP Holdco for $327.0 million, which is expected to be paid in the fourth quarter of 2023.

Pursuant to the MVP Joint Venture's limited liability company agreement, MVP Holdco is obligated to provide performance assurances in respect of the MVP project, which may take the form of a guarantee from EQM (provided that EQM's debt is rated as investment grade in accordance with the requirements of the MVP Joint Venture's limited liability company agreement), a letter of credit or cash collateral, in favor of the MVP Joint Venture to provide assurance as to the funding of

13

MVP Holdco's proportionate share of the construction budget for the MVP project. As of September 30, 2023, the letter of credit with respect to the MVP project was in the amount of approximately $219.7 million. The letter of credit with respect to the MVP project is expected to continue to reduce over time as the Company contributes capital to fund MVP Holdco's remaining proportionate share of the construction budget.

The Company's ownership interest in the MVP Joint Venture related to the MVP project is significant for the nine months ended September 30, 2023 as defined by the SEC's Regulation S-X Rule 1-02(w). Accordingly, as required by Regulation S-X Rule 3-09, the following tables summarize the unaudited condensed consolidated financial statements of the MVP Joint Venture in relation to the MVP project.

Condensed Balance Sheets

	September 30, 2023		December 31, 2022
	(Thousands)
Current assets	$	250,231	$	71,535
Non-current assets	7,510,768		6,737,064
Total assets	$	7,760,999	$	6,808,599
Current liabilities	$	236,947	$	118,679
Equity	7,524,052		6,689,920
Total liabilities and equity	$	7,760,999	$	6,808,599

Condensed Statements of Operations

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
	(Thousands)
Operating (expense) income	$	—	$	(20)	$	—	$	20
Other income	1,368		—		1,930		—
Net interest income	46,191		120		61,114		172
AFUDC - equity	107,785		—		142,607		—
Net income	$	155,344	$	100	$	205,651	$	192

MVP Southgate Project. In April 2018, the MVP Joint Venture announced the MVP Southgate project, which is a contemplated interstate pipeline that was approved by the FERC to extend approximately 75-miles from the MVP at Pittsylvania County, Virginia to new delivery points in Rockingham and Alamance Counties, North Carolina. The Company is expected to operate the MVP Southgate pipeline and owned a 47.2% interest in the MVP Southgate project as of September 30, 2023. The MVP Joint Venture continues to engage with the project shipper, Dominion Energy North Carolina, and a prospective customer regarding refining the MVP Southgate project’s design, scope and/or timing for the benefit of such customers in lieu of pursuing the project as originally contemplated. Dominion Energy North Carolina’s obligations under the precedent agreement in support of the original project are subject to certain conditions, including, among others, that the MVP Joint Venture will have completed construction of the project facilities by December 31, 2023. The Company is unable to ensure the results of the continued engagement between the MVP Joint Venture and Dominion Energy North Carolina and a prospective customer, including the ultimate design, scope, timing, undertaking or completion of the project.

Pursuant to the MVP Joint Venture's limited liability company agreement, MVP Holdco is obligated to provide performance assurances in respect of MVP Southgate, which performance assurances may take the form of a guarantee from EQM (provided that EQM's debt is rated as investment grade in accordance with the requirements of the MVP Joint Venture's limited liability company agreement), a letter of credit or cash collateral. On April 6, 2023, EQM’s $14.2 million letter of credit with respect to the MVP Southgate project was terminated, following the determination to temporarily defer partners’ obligations to post performance assurances with respect to the MVP Southgate project, which may be reinstated upon further developments. Upon the FERC’s initial release to begin construction of the MVP Southgate project, the Company will be obligated to deliver an allowable form of performance assurance in an amount equal to 33% of MVP Holdco’s proportionate share of the remaining capital obligations under the applicable construction budget.

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5.     Share-based Compensation Plans

In December 2021, at the recommendation of the Human Capital and Compensation Committee (the Compensation Committee) and approval of the Company’s Board of Directors (the Board), the Company granted a special, one-time, performance award program designed to reward all employees should the Company’s most complex and strategically significant project, the MVP project, be placed in-service (the MVP PSU Program). The Company granted 1,450,110 shares to all participants in the 2018 Long-Term Incentive Plan, as amended, as of November 1, 2021 (LTIP Participants), except the Company’s named executive officers (NEOs) and certain other senior leaders (collectively, the Senior Executives), and 1,158,030 shares to the Senior Executives. The MVP PSU Program awards were granted on December 6, 2021 and will be paid in Company common stock, contingent on the MVP Joint Venture being authorized by the FERC to commence service on the MVP (such authorization, the In-Service Date) on or before a specified expiration date of January 1, 2024 (the Expiration Date, the continued applicability of which is discussed below), subject to continued service through the applicable payment date:

•As to shares issued to the LTIP Participants, 100% will be paid on the date selected by the Company that is not later than 90 days after the In-Service Date;

•As to shares issued to the Senior Executives:

•50% will be paid on the date selected by the Company that is not later than 90 days after the In-Service Date;

•25% will be paid on the date selected by the Company that is not later than 30 days after the first anniversary of the In-Service Date; and

•25% will be paid on the date selected by the Company that is not later than 30 days after the second anniversary of the In-Service Date.

Dividends are eligible to be paid in cash upon vesting on each share of common stock as dividends are declared on the Company's common stock during the vesting period.

The achievement of the MVP Joint Venture being authorized by the FERC to commence service on the MVP on or before the Expiration Date represented a performance condition as defined by ASC 718, Share-based Compensation, that should be assessed at the end of each reporting period as to whether the performance condition is probable of being achieved. Due to the graded vesting of the MVP PSU Program awards to the Senior Executives, the Company recognizes compensation cost over the requisite service period for each separately vested tranche of the award as though each award was, in substance, its own award. In June 2023, the performance condition associated with the MVP PSU Program awards was deemed to be probable. During the nine months ended September 30, 2023, the Company recognized compensation cost of approximately $19.4 million that includes the cumulative catch-up of approximately $14.1 million to reflect the requisite service period of each award that has been provided to date. As of September 30, 2023, there was approximately $4.9 million of unrecognized compensation cost related to non-vested MVP PSU Program awards that is expected to be recognized over a remaining weighted average vesting term of approximately 0.8 years.

The following table provides detailed information on the MVP PSU Program as of September 30, 2023:

MVP PSU Program	Non-vested Shares	Grant Date Fair Value (a)	Fair Value (Thousands)		Requisite Service Period	Unrecognized Compensation Cost (Thousands)
LTIP Participants	1,367,983	$9.59	$	13,119	28 months	$	1,551
Senior Executives T1	579,015	$9.59	5,553		28 months	666
Senior Executives T2	289,511	$9.59	2,776		40 months	1,126
Senior Executives T3	289,504	$9.59	2,776		52 months	1,530

(a)    Determined based upon the closing price of the Company's common stock on the day before the grant date.

In connection with considering the Company’s ongoing efforts to complete the MVP project, the Board took note of the significant legal and regulatory obstacles that delayed progress on the MVP project that were outside of the control of the Company, particularly since the inception of the MVP PSU Program, the efforts undertaken by many of the Company’s employees, including the NEOs, to overcome these obstacles, and ongoing risks. The Board also is focused on and seeks to promote the Company's top priority of completing the MVP project safely and in compliance with applicable environmental standards. Taking into account these factors, the proximity of the Expiration Date, and noting the potential that the Expiration

15

Date could distract from, or be cited by project opponents as a distraction from, a focus on safety and environmental compliance, the Board, on July 26, 2023, with the recommendation of the Compensation Committee, approved an amendment to the MVP PSU Program to eliminate the Expiration Date as a term of the MVP PSU Program and all award agreements thereunder (the MVP PSU Amendment).

Accordingly, the Equitrans Midstream Corporation Senior Executive 2021 MVP Performance Share Units Award Agreements to which the NEOs are parties and the Equitrans Midstream Corporation LTIP Participant 2021 MVP Performance Share Units Award Agreements were amended to reflect the elimination of the Expiration Date, and the calculation of shares retained in the event of a participant’s termination due to death, disability or retirement also was clarified. All other terms of the award agreements remain in full force and effect.

The MVP PSU Amendment resulted in a change to the original performance condition of the MVP PSU Program. As such, the Company accounted for the MVP PSU Amendment as a Type Ι modification in accordance with ASC 718, which did not result in any additional compensation cost related to the awards.

6.    Debt

Amended EQM Credit Facility. As of September 30, 2023, the Company had aggregate commitments available under that certain Third Amended and Restated Credit Agreement, dated as of October 31, 2018 (as amended, supplemented or otherwise modified, the Amended EQM Credit Facility), among EQM, as borrower, Wells Fargo Bank, National Association, as the administrative agent, swing line lender, and an L/C issuer, the lenders party thereto from time to time and any other persons party thereto from time to time, of approximately $2.16 billion before October 31, 2023, with approximately $1.55 billion in aggregate commitments available on and after October 31, 2023 and prior to April 30, 2025. As of September 30, 2023, EQM had approximately $525 million of borrowings and $220.7 million of letters of credit outstanding under the Amended EQM Credit Facility. The amount EQM is able to borrow under the Amended EQM Credit Facility is bounded by a maximum Consolidated Leverage Ratio (as defined in the Amended EQM Credit Facility) that, as of September 30, 2023, could not exceed 5.50 to 1.00. Effective as of October 1, 2023 (the MVP Mobilization Effective Date, as defined in the Amended EQM Credit Facility), the maximum Consolidated Leverage Ratio permitted with respect to the fiscal quarter ending December 31, 2023 and the end of each of EQM’s three consecutive fiscal quarters thereafter is 5.85 to 1.00, with the then-applicable ratio being tested as of the end of each fiscal quarter. As of the MVP Mobilization Effective Date, as defined in the Amended EQM Credit Facility, EQM expects to have the ability to borrow approximately $0.6 billion under the Amended EQM Credit Facility. As of December 31, 2022, EQM had approximately $240 million of borrowings and $234.9 million of letters of credit outstanding under the Amended EQM Credit Facility. For the avoidance of doubt, any reference to the Amended EQM Credit Facility as of any particular date shall mean the Amended EQM Credit Facility as in effect on such date.

During the three and nine months ended September 30, 2023, the maximum outstanding borrowings at any time were approximately $525 million and the average daily balances were approximately $337 million and $263 million, respectively. EQM incurred interest at weighted average annual interest rates of approximately 8.2% and 7.9% for the three and nine months ended September 30, 2023, respectively. For the three and nine months ended September 30, 2023, commitment fees of $2.0 million and $6.4 million, respectively, were paid to maintain credit availability under the Amended EQM Credit Facility. During the three and nine months ended September 30, 2022, the maximum outstanding borrowings at any time were approximately $190 million and $280 million, respectively, and the average daily balances were approximately $143 million and $176 million, respectively. EQM incurred interest at weighted average annual interest rates of approximately 4.8% and 3.8% for the three and nine months ended September 30, 2022, respectively. For the three and nine months ended September 30, 2022, commitment fees of $2.3 million and $6.1 million, respectively, were paid to maintain credit availability under the Amended EQM Credit Facility. As of September 30, 2023, no term loans were outstanding under the Amended EQM Credit Facility.

See Note 10 for a discussion of the Fourth Amendment (as defined in Note 10) to the Amended EQM Credit Facility.

Eureka Credit Facility. On May 13, 2021, Eureka Midstream, LLC (Eureka) entered into a $400 million senior secured revolving credit facility with Sumitomo Mitsui Banking Corporation, as administrative agent, the lenders party thereto from time to time and any other persons party thereto from time to time (the 2021 Eureka Credit Facility). On March 29, 2023, Eureka entered into an amendment (the First Eureka Amendment) to the 2021 Eureka Credit Facility. The First Eureka Amendment replaced the London Interbank Offered Rate with the Secured Overnight Financing Rate as the benchmark rate for borrowings, including a credit spread adjustment of 0.10% for all applicable interest periods, as well as for daily swing line borrowings. Any reference to the 2021 Eureka Credit Facility as of any particular date shall mean the 2021 Eureka Credit Facility as in effect on such date.

As of September 30, 2023, and December 31, 2022, Eureka had approximately $315 million and $295 million, respectively, of borrowings outstanding under the 2021 Eureka Credit Facility. For the three and nine months ended September 30, 2023, the

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maximum amount of outstanding borrowings under the 2021 Eureka Credit Facility at any time were approximately $315 million, the average daily balances were approximately $315 million and $307 million, respectively, and Eureka incurred interest at weighted average annual interest rates of approximately 8.0% and 7.6%, respectively. For the three and nine months ended September 30, 2023, commitment fees of $0.1 million and $0.3 million, respectively, were paid to maintain credit availability under the 2021 Eureka Credit Facility. For the three and nine months ended September 30, 2022, the maximum amount of outstanding borrowings under the 2021 Eureka Credit Facility at any time was approximately $295 million, the average daily balances were approximately $290 million and $296 million, respectively, and Eureka incurred interest at weighted average annual interest rates of approximately 4.8% and 4.3%, respectively. For the three and nine months ended September 30, 2022, commitment fees of $0.1 million and $0.4 million, respectively, were paid to maintain credit availability under the 2021 Eureka Credit Facility.

See Note 10 for a discussion of the Second Eureka Amendment (as defined in Note 10) to the 2021 Eureka Credit Facility.

2023 Senior Notes Redemption. On June 21, 2023 (the Redemption Date), EQM redeemed in full its remaining outstanding 4.75% Senior Notes due 2023 (the 2023 Notes) in the aggregate principal amount of $98.9 million, pursuant the Indenture, dated as of August 1, 2014, by and between EQM, the subsidiary guarantors party thereto and The Bank of New York Mellon Trust Company, N.A. (BNYMTC), as trustee, as supplemented by that certain Third Supplemental Indenture, dated as of June 25, 2018, by and between the EQM and BNYMTC, at a redemption price equal to 100% of the principal amount of the 2023 Notes, plus accrued and unpaid interest to, but not including, the Redemption Date. Upon the redemption by EQM of the 2023 Notes, the Third Supplemental Indenture was discharged and ceased to be of further effect except as to rights thereunder. EQM utilized cash on hand to effect payment of the redemption on the Redemption Date.

2022 Senior Notes. On June 7, 2022, EQM completed a private offering of $500 million aggregate principal amount of new 7.50% senior notes due 2027 (the 2027 Notes) and $500 million aggregate principal amount of new 7.50% senior notes due 2030 (the 2030 Notes and, together with the 2027 Notes, the 2022 Senior Notes) and received net proceeds from the offering of approximately $984.5 million inclusive of a discount of approximately $12.5 million and debt issuance costs of approximately $3.0 million.

EQM used the net proceeds from the offering of the 2022 Senior Notes and cash on hand to purchase (i) an aggregate principal amount of approximately $501.1 million of its then outstanding 2023 Notes pursuant to a tender offer for any and all of the outstanding 2023 Notes (the Any and All Tender Offer) and an open market purchase following the expiration of the Any and All Tender Offer, and (ii) an aggregate principal amount of $300 million of its outstanding 6.00% notes due 2025 (2025 Notes), and an aggregate principal amount of $200 million of its outstanding 4.00% notes due 2024 (2024 Notes), pursuant to tender offers (the Maximum Tender Offers, together with the Any and All Tender Offer, the 2022 Tender Offers) for the 2025 Notes and 2024 Notes, which such Maximum Tender Offers reflected a maximum aggregate principal amount of 2025 Notes and 2024 Notes to be purchased of $500 million (such amount, the Aggregate Maximum Principal Amount).

2022 Tender Offers. On June 6, 2022, the Any and All Tender Offer expired and, on June 7, 2022 and June 9, 2022, EQM purchased an aggregate principal amount of approximately $496.8 million of 2023 Notes at an aggregate cost of approximately $506.7 million pursuant to the Any and All Tender Offer. On June 10, 2022, which was after the closing of the Any and All Tender Offer, EQM also repurchased an aggregate principal amount of approximately $4.3 million of 2023 Notes in the open market at an aggregate cost of approximately $4.4 million. On June 13, 2022, which was the early tender deadline for the Maximum Tender Offers, the Aggregate Maximum Principal Amount was fully subscribed by the 2024 Notes and 2025 Notes then tendered, and, on June 14, 2022, EQM purchased an aggregate principal amount of $200 million of 2024 Notes and $300 million of 2025 Notes at an aggregate cost of approximately $509 million (inclusive of the applicable early tender premium for the 2024 Notes and 2025 Notes described in that certain Offer to Purchase of EQM dated May 31, 2022, as amended).

During the nine months ended September 30, 2022, the Company incurred a loss on extinguishment of debt of approximately $24.9 million related to the payment of the 2022 Tender Offers and open market repurchase premiums and fees, and write off of the respective unamortized discounts and financing costs associated with the purchase of portions of 2023, 2024 and 2025 Notes in the 2022 Tender Offers. This amount is included in the loss on extinguishment of debt line on the statements of consolidated comprehensive income.

As of September 30, 2023, EQM and Eureka were in compliance with all debt provisions and covenants.

7.    Fair Value Measurements

Assets Measured at Fair Value on a Recurring Basis. The Company records derivative instruments at fair value on a gross basis in its consolidated balance sheets. The EQT Global GGA provides for potential cash bonus payments payable by EQT to the Company during the period beginning on the first day of the calendar quarter in which the MVP full in-service date occurs

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through the calendar quarter ending December 31, 2024 (the Henry Hub cash bonus payment provision). The potential cash bonus payments are conditioned upon the quarterly average of certain Henry Hub natural gas prices exceeding certain price thresholds. The Henry Hub cash bonus payment provision is accounted for as a derivative instrument and recorded at its estimated fair value using a Monte Carlo simulation model. Significant inputs used in the fair value measurement include NYMEX Henry Hub natural gas futures prices as of the date of valuation, probability-weighted assumptions regarding MVP project completion, risk-free interest rates based on U.S. Treasury rates, expected volatility of NYMEX Henry Hub natural gas futures prices and an estimated credit spread of EQT. The probability-weighted assumptions regarding MVP project completion utilizing internally developed methodologies, and the expected volatility of NYMEX Henry Hub natural gas futures prices, used in the valuation methodology represent significant unobservable inputs causing the Henry Hub cash bonus payment provision to be designated as a Level 3 fair value measurement. An expected average volatility of approximately 50.0% was utilized in the valuation model, which is based on market-quoted volatilities of relevant NYMEX Henry Hub natural gas forward prices.

As of September 30, 2023, the fair value of the Henry Hub cash bonus payment provision was $30.4 million, of which $25.3 million was recorded in other current assets and $5.1 million was recorded in other assets on the Company's consolidated balance sheets. As of December 31, 2022, the fair value of the Henry Hub cash bonus payment provision was $23.0 million which was recorded in other assets on the Company's consolidated balance sheets. During the three and nine months ended September 30, 2023, the Company recognized a loss of $3.4 million and a gain of $7.5 million, respectively, and during the three and nine months ended September 30, 2022, the Company recognized a loss of $0.8 million and a gain of $4.5 million, respectively, representing the change in estimated fair value of the derivative instrument during the respective periods, which in each case are recorded in other (expense) income, net in the Company's statements of consolidated comprehensive income.

Other Financial Instruments. The carrying values of cash and cash equivalents, accounts receivable and accounts payable approximate fair value due to the short maturity of the instruments. The carrying values of borrowings under the Amended EQM Credit Facility and the 2021 Eureka Credit Facility approximate fair value as the interest rates are based on prevailing market rates. As EQM's borrowings under its senior notes are not actively traded, their fair values are estimated using an income approach model that applies a discount rate based on prevailing market rates for debt with similar remaining time-to-maturity and credit risk; as such, their fair values are Level 2 fair value measurements. The fair value of the Preferred Interest is a Level 3 fair value measurement and is estimated using an income approach model that applies a market-based discount rate. As of September 30, 2023, and December 31, 2022, the estimated fair values of the Preferred Interest were approximately $88.5 million and $95.2 million, respectively, and the carrying values of the Preferred Interest were approximately $90.0 million and $94.3 million, respectively. As of September 30, 2023, the carrying value of the Preferred Interest exceeded its estimated fair value, which was considered temporary and not material.

8.    Earnings Per Share

The Company excluded 1,033 (in thousands) of weighted average anti-dilutive securities related to stock-based compensation awards from the computation of diluted weighted average common shares outstanding for the nine months ended September 30, 2023. The Company excluded 844 and 782 (in thousands) of weighted average anti-dilutive securities related to stock-based compensation awards from the computation of diluted weighted average common shares outstanding for the three and nine months ended September 30, 2022, respectively. The Equitrans Midstream Preferred Shares were anti-dilutive to the computation of diluted weighted average common shares outstanding for all periods presented.

The Company grants Equitrans Midstream phantom units to non-employee directors that will be paid in Equitrans Midstream common stock upon the director's termination of service from the Company's Board of Directors. As there are no remaining service, performance or market conditions related to these awards, 819 and 723 (in thousands) Equitrans Midstream phantom units were included in the computation of basic and diluted weighted average common shares outstanding for the three and nine months ended September 30, 2023, respectively, and 567 and 599 (in thousands) Equitrans Midstream phantom units were included in the computation of basic and diluted weighted average common shares outstanding for the three and nine months ended September 30, 2022, respectively.

9.     Income Taxes

The Company's effective tax rate was (9.2)% for the three months ended September 30, 2023 compared to 0.1% for the three months ended September 30, 2022. The Company's effective tax rate was (4.9)% for the nine months ended September 30, 2023 compared to (2.4)% for the nine months ended September 30, 2022. The Company calculates the provision for income taxes for interim periods by applying an estimate of the annual effective tax rate for the full fiscal year to "ordinary" income or loss (income (loss) before income taxes excluding unusual or infrequently occurring items) for the periods. The effective tax rate was lower for the three and nine months ended September 30, 2023 compared to the three and nine months ended September 30, 2022 and lower compared to the statutory rate for the three and nine months ended September 30, 2023 primarily due to the impact of projected AFUDC – equity on the MVP project and the impact of changes in the valuation allowance that

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limit tax benefits for the Company’s federal and state deferred tax assets. The effective tax rate for the three and nine months ended September 30, 2022 was lower than the statutory rate due to the increase in the valuation allowances that limit tax benefits for the Company’s federal and state deferred tax assets, primarily due to the impairment of the Company's equity method investment in the MVP Joint Venture and its impact on the loss before income taxes.

For the nine months ended September 30, 2023, the Company recorded unrecognized tax benefits and interest of $1.2 million. During the three months ended September 30, 2023, unrecognized tax benefits and interest decreased by approximately $1.0 million due to the expiration of statutes of limitation, which impacted the effective tax rate. Interest on unrecognized tax benefits was $0.2 million for the nine months ended September 30, 2023, which was recorded as a component of income tax expense.

For the nine months ended September 30, 2023, the Company believes that it is more likely than not that the benefit from a portion of its federal and state net operating loss (NOL) carryforwards, deferred tax assets related to interest disallowance under Internal Revenue Code Section 163(j), and certain state deferred tax assets, net of offsetting deferred tax liabilities, will not be realized and accordingly, the Company maintains related valuation allowances. For the nine months ended September 30, 2023, the Company recorded approximately $68.3 million income tax benefit related to changes in valuation allowances because of decreases in federal and state deferred tax assets. As of September 30, 2023 and December 31, 2022, the valuation allowances related to federal and state deferred tax assets were approximately $88.4 million and $156.7 million, respectively.

10.     Subsequent Events

On October 5, 2023, Eureka entered into an amendment (the Second Eureka Amendment) to the 2021 Eureka Credit Facility. The Second Eureka Amendment extended the stated maturity date of the 2021 Eureka Credit Facility, with such extension only applicable for the lenders approving the Second Eureka Amendment, from November 13, 2024 to November 13, 2025.

On October 6, 2023 (the Fourth Amendment Date), EQM entered into an amendment (the Fourth Amendment) to the Amended EQM Credit Facility. The Fourth Amendment extended the stated maturity date of the Amended EQM Credit Facility with such extension only applicable for the lenders approving the Fourth Amendment, from April 30, 2025 to April 30, 2026. After giving effect to such extension contemplated by the Fourth Amendment, EQM has aggregate commitments available under the Amended EQM Credit Facility of approximately $2.16 billion before October 31, 2023, approximately $1.55 billion in aggregate commitments available on and after October 31, 2023 and prior to April 30, 2025, and approximately $1.45 billion in aggregate commitments available on and after April 30, 2025 and prior to April 30, 2026.

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EQUITRANS MIDSTREAM CORPORATION

Item 2.  Management's Discussion and Analysis of Financial Condition and Results of Operations

You should read the following discussion and analysis of financial condition and results of operations in conjunction with the consolidated financial statements, and the notes thereto, included elsewhere in this report.

Cautionary Statements

Disclosures in this Quarterly Report on Form 10-Q contain certain forward-looking statements within the meaning of Section 21E of the Securities Exchange Act of 1934, as amended (the Exchange Act), and Section 27A of the Securities Act of 1933, as amended (the Securities Act). Statements that do not relate strictly to historical or current facts are forward-looking and usually identified by the use of words such as “aim,” “anticipate,” “approximate,” “aspire,” “assume,” “believe,” “budget,” “continue,” “could,” “design,” “estimate,” “expect,” “focused,” “forecast,” “goal,” “guidance,” “intend,” “may,” “objective,” “opportunity,” “outlook,” “plan,” “position,” “potential,” “predict,” “project,” “pursue,” “scheduled,” “seek,” “should,” “strategy,” “strive,” “target,” “view,” “will,” or “would” and other words of similar meaning in connection with any discussion of future operating or financial matters. Without limiting the generality of the foregoing, forward-looking statements contained in this Quarterly Report on Form 10-Q include the matters discussed in the section captioned "Outlook" in Part I, "Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations," and the expectations of plans, strategies, objectives, and growth and anticipated financial and operational performance of Equitrans Midstream Corporation (together with its subsidiaries, Equitrans Midstream or the Company), including the following and/or statements with respect thereto, as applicable:

•guidance and any changes in such guidance in respect of the Company’s gathering, transmission and storage and water services revenue and volume, including the anticipated effects associated with the EQT Global GGA and related documents entered into with EQT;

•projected revenue (including from firm reservation fees) and volumes, gathering rates, deferred revenues, expenses and contract liabilities, and the effects on liquidity, leverage, projected revenue, deferred revenue and contract liabilities associated with the EQT Global GGA and the MVP project (including changes in timing for such project);

•the ultimate gathering MVC fee relief, and timing thereof, provided to EQT under the EQT Global GGA and related agreements;

•the Company's ability to de-lever and timing and means thereof;

•the ultimate financial, business, reputational and/or operational impacts resulting, directly or indirectly, from the Rager Mountain natural gas storage field incident;

•the weighted average contract life of gathering, transmission and storage contracts;

•infrastructure programs (including the targeted or ultimate timing, cost, capacity and sources of funding with respect to gathering, transmission and storage and water projects);

•the cost to construct or restore right-of-way for, capacity of, shippers for, timing and durability of regulatory approvals and concluding litigation, final design (including project scope, expansions, extensions or refinements and capital related thereto), ability and timing to contract additional capacity on, mitigate emissions from, targeted in-service dates of, and completion (including potential timing of such completion) of current, planned or in-service projects or assets, in each case as applicable;

•the effect of the Fiscal Responsibility Act of 2023 on the MVP Joint Venture's ability to complete the MVP project;

•the ability to achieve, and targeted timing for achieving, completion of the MVP project, risks related thereto, the realizability of the MVP performance award program, and the degree to which, if at all, the MVP PSU Amendment (as defined in Note 5) fosters the Company completing the MVP project safely and in compliance with environmental standards;

•the targeted total MVP project cost and schedule, including the timing for contractual obligations to commence, and the ability to continue construction in the winter, potential receipt of in-service authorization, and the realizability of the perceived benefits of the MVP project;

•the realizability of all or any portion of the Henry Hub cash bonus payment provision of the EQT Global GGA;

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•the potential for future bipartisan support for, and the potential timing for, additional federal energy infrastructure permitting reform legislation to be enacted;

•the ultimate terms, partner relationships and structure of the MVP Joint Venture and ownership interests therein;

•the impact of changes in assumptions and estimates relating to the potential completion and full in-service timing of the MVP project (as well as changes in such timing) on, among other things, the fair value of the Henry Hub cash bonus payment provision of the EQT Global GGA, gathering rates, the amount of gathering MVC fee relief and the estimated transaction price allocated to the Company's remaining performance obligations under certain contracts with firm reservation fees and MVCs;

•the Company's ability to identify and complete opportunities to optimize its existing asset base and/or expansion projects in the Company's operating areas and in areas that would provide access to new markets;

•the Company's ability to bring, and targeted timing for bringing, in-service the backbone of its mixed-use water system (and expansions thereto), and realize benefits therefrom in accordance with its strategy for its water services business segment;

•     the Company's ability to identify and complete acquisitions and other strategic transactions, including joint ventures, effectively integrate transactions into the Company's operations, and achieve synergies, system optionality, accretion and other benefits associated with transactions, including through increased scale;

•     the potential for the MVP project, EQM's leverage, customer credit ratings changes, defaults, acquisitions, dispositions and financings to impact EQM's credit ratings and the potential scope of any such impacts;

•     the effect and outcome of contractual disputes, litigation and other proceedings, including regulatory investigations and proceedings;

•     the potential effects of any consolidation of or effected by upstream gas producers, including acquisitions of midstream assets, whether in or outside of the Appalachian Basin;

•     the potential for, timing, amount and effect of future issuances or repurchases of the Company's securities;

•     the effects of conversion, if at all, of the Equitrans Midstream Preferred Shares;

•     the effects of seasonality;

•     expected cash flows, cash flow profile (and support therefor from certain contract structures) and MVCs, including those associated with the EQT Global GGA, and the potential impacts thereon of the commission and in-service timing (or absence thereof) and cost of the MVP project;

•     projected capital contributions and capital and operating expenditures, including the amount and timing of reimbursable capital expenditures, capital budget and sources of funds for capital expenditures;

•     the Company's ability to recoup replacement and related costs;

•     future dividend amounts, timing and rates;

•     statements regarding macroeconomic factors' effects on the Company's business, including future commodity prices and takeaway capacity constraints in the Appalachian Basin;

•     future decisions of customers in respect of production growth, curtailing natural gas production, timing of turning wells in line, rig and completion activity and related impacts on the Company's business, and the effect, if any, on such future decisions should the MVP be brought in-service, as well as the potential for increased volumes to flow to the Company's gathering and transmission system to supply the MVP following in-service;

•     the Company's liquidity and financing position and requirements, including sources, availability and sufficiency;

•     statements regarding future interest rates and/or reference rates and the potential impacts thereof;

•     the ability of the Company's subsidiaries (some of which are not wholly owned) to service debt under, and comply with the covenants contained in, their respective credit agreements;

•     expectations regarding natural gas and water volumes in the Company's areas of operations;

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•     the Company's ability to achieve anticipated benefits associated with the execution of the EQT Global GGA and other commercial agreements;

•     the Company's ability to position itself for a lower carbon economy, achieve, and create value from, its environmental, social and governance (ESG) and sustainability initiatives, targets and aspirations (including targets and aspirations set forth in its climate policy) and respond, and impacts of responding, to increasing stakeholder scrutiny in these areas;

•     the effectiveness of the Company's information technology and operational technology systems and practices to detect and defend against evolving cyberattacks on United States critical infrastructure;

•     the effects and associated cost of compliance with existing or new government regulations including any quantification of potential impacts of regulatory matters related to climate change on the Company; and

•     future tax rates, status and position.

The forward-looking statements included in this Quarterly Report on Form 10-Q involve risks and uncertainties that could cause actual results to differ materially from projected results. Accordingly, investors should not place undue reliance on forward-looking statements as a prediction of actual results. The Company has based these forward-looking statements on management's current expectations and assumptions about future events. While the Company considers these expectations and assumptions to be reasonable, they are inherently subject to significant business, economic, competitive, regulatory, judicial, construction and other risks and uncertainties, many of which are difficult to predict and are beyond the Company's control, including, as it pertains to the MVP project, risks and uncertainties such as the physical construction conditions, including steep slopes and any further unexpected geological impediments, continued crew availability and productivity realizable in the winter season, project opposition, the receipt of certain time of year and other variances and approvals, and potential winter weather. The risks and uncertainties that may affect the operations, performance and results of the Company's business and forward-looking statements include, but are not limited to, those set forth under Part I, "Item 1A. Risk Factors" in the Company's Annual Report on Form 10-K for the year ended December 31, 2022, as updated by this Quarterly Report on Form 10-Q, as applicable.

Any forward-looking statement speaks only as of the date on which such statement is made, and the Company does not intend to correct or update any forward-looking statement, unless required by securities laws, whether as a result of new information, future events or otherwise. As forward-looking statements involve significant risks and uncertainties, caution should be exercised against placing undue reliance on such statements.

Executive Overview

Net income (loss) attributable to Equitrans Midstream common shareholders was $112.8 million, $0.26 per diluted share, for the three months ended September 30, 2023 compared to $(520.5) million, $(1.20) per diluted share, for the three months ended September 30, 2022. The increase resulted primarily from an impairment of the Company's equity method investment in the MVP Joint Venture incurred during the three months ended September 30, 2022, higher equity income and higher income tax benefit, partially offset by higher operating expenses.

Net income (loss) attributable to Equitrans Midstream common shareholders was $252.5 million, $0.58 per diluted share, for the nine months ended September 30, 2023 compared to $(393.8) million, $(0.91) per diluted share, for the nine months ended September 30, 2022. The increase resulted primarily from an impairment of the Company's equity method investment in the MVP Joint Venture incurred during the nine months ended September 30, 2022, higher equity income, higher operating revenues, a loss on extinguishment of debt incurred during the nine months ended September 30, 2022 and higher income tax benefit, partially offset by higher operating expenses and higher interest expense.

In the course of its 2022 year-end process, the Company identified certain corrections in its previously issued unaudited interim consolidated financial statements primarily related to the accounting for the Henry Hub cash bonus payment provision. The Company determined that the related impact was not material and has revised its previously issued unaudited interim consolidated financial statements for the affected prior periods. See Note 1 for additional information.

In September 2023, the Company announced that, effective January 1, 2024, Mr. Thomas F. Karam will step down as Chief Executive Officer (CEO) of the Company and Diana M. Charletta, currently the Company’s President and Chief Operating Officer, will succeed Mr. Karam as CEO. Mr. Karam will remain with the Company as Executive Chairman. Also in September 2023, Mr. Karam was awarded and paid a $7.5 million bonus (Bonus) in express recognition of Mr. Karam’s relentless efforts towards navigating legal and regulatory setbacks to the MVP project, including, specifically, building consensus over a substantial period of time regarding the importance of the MVP project to the nation’s energy security and reliability with a variety of stakeholders, particularly with members of the United States Congress and the Biden Administration, which was

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reflected in the historic inclusion of provisions mandating the completion of the MVP project in the Fiscal Responsibility Act of 2023.

Business Segment Results

Operating segments are revenue-producing components of an enterprise for which separate financial information is produced internally and is subject to evaluation by the chief operating decision maker in deciding how to allocate resources. Headquarters costs consist primarily of certain unallocated corporate expenses and transaction costs, as applicable. Net interest expense, loss on extinguishment of debt, components of other income (expense), net and income tax expense (benefit) are managed on a consolidated basis. The Company has presented each segment's operating income (loss), other income (expense), net, equity income, impairment of equity method investment and various operational measures, as applicable, in the following sections. Management believes that the presentation of this information is useful to management and investors regarding the financial condition, results of operations and trends and uncertainties of its segments. The Company has reconciled each segment's operating income (loss) to the Company's consolidated operating income (loss) and net income (loss) in Note 2.

Gathering Results of Operations

	Three Months Ended September 30,					Nine Months Ended September 30,
	2023		2022		% Change	2023		2022		% Change
	(Thousands, except per day amounts)
FINANCIAL DATA
Firm reservation fee revenues (a)	$	147,137	$	144,730	1.7	$	428,945	$	415,932	3.1
Volumetric-based fee revenues (b)	72,950		82,450		(11.5)	212,088		256,352		(17.3)
Total operating revenues	220,087		227,180		(3.1)	641,033		672,284		(4.6)
Operating expenses:
Operating and maintenance	23,799		27,855		(14.6)	70,331		71,971		(2.3)
Selling, general and administrative	30,365		21,717		39.8	88,319		60,051		47.1
Depreciation	48,585		49,125		(1.1)	147,321		145,953		0.9
Amortization of intangible assets	16,204		16,204		—	48,614		48,614		—
Total operating expenses	118,953		114,901		3.5	354,585		326,589		8.6
Operating income	$	101,134	$	112,279	(9.9)	$	286,448	$	345,695	(17.1)
Other (expense) income, net (c)	$	(3,445)	$	2,904	(218.6)	$	7,477	$	8,210	(8.9)
OPERATIONAL DATA
Gathered volumes (BBtu per day)
Firm capacity (d)	5,628		5,125		9.8	5,399		5,199		3.8
Volumetric-based services	2,356		2,413		(2.4)	2,198		2,600		(15.5)
Total gathered volumes	7,984		7,538		5.9	7,597		7,799		(2.6)
Capital expenditures (e)	$	67,551	$	73,589	(8.2)	$	199,157	$	195,925	1.6

(a)For the three and nine months ended September 30, 2023, firm reservation fee revenues included approximately $1.8 million and $7.5 million, respectively, of MVC unbilled revenues. For the three and nine months ended September 30, 2022, firm reservation fee revenues included approximately $8.5 million and $17.4 million, respectively, of MVC unbilled revenues.

(b)For the nine months ended September 30, 2023, volumetric-based fee revenues included a one-time contract buyout by a customer for approximately $5.0 million.

(c)Other (expense) income, net includes the unrealized (loss) gain on derivative instruments associated with the Henry Hub cash bonus payment provision and gain on sale of gathering assets. See Note 7 for further information on the Henry Hub cash bonus payment provision.

(d)Includes volumes up to the contractual MVC under agreements structured with MVCs. Volumes in excess of the contractual MVC are reported under volumetric-based services.

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(e)Includes approximately $3.3 million and $11.5 million of capital expenditures related to the noncontrolling interest in Eureka Midstream for the three and nine months ended September 30, 2023, respectively, and includes approximately $5.9 million and $17.6 million of capital expenditures related to such noncontrolling interest for the three and nine months ended September 30, 2022, respectively.

Three Months Ended September 30, 2023 Compared to Three Months Ended September 30, 2022

Gathering operating revenues decreased by $7.1 million for the three months ended September 30, 2023 compared to the three months ended September 30, 2022. Firm reservation fee revenues increased by $2.4 million due to increased contracted capacity. Volumetric-based fee revenues decreased by $9.5 million primarily due to lower effective rates.

Gathering operating expenses increased by $4.1 million for the three months ended September 30, 2023 compared to the three months ended September 30, 2022. Selling, general and administrative expenses increased by $8.6 million largely due to higher personnel costs primarily attributable to the Bonus. The increase in selling, general and administrative expenses is partially offset by a decrease in operating and maintenance expenses of $4.1 million primarily due to lower operating expenses associated with the divestiture of the regulated low pressure gathering assets in June 2023 and lower repairs and maintenance expense, partially offset by higher personnel costs.

Nine Months Ended September 30, 2023 Compared to Nine Months Ended September 30, 2022

Gathering operating revenues decreased by $31.3 million for the nine months ended September 30, 2023 compared to the nine months ended September 30, 2022. Firm reservation fee revenues increased by $13.0 million primarily due to $17.1 million of higher firm reservation fees associated with the EQT Global GGA due to assumption changes impacting the estimated total consideration in the prior year and increased contracted capacity, partially offset by lower average rates on a certain customer MVC. Volumetric-based fee revenues decreased by $44.3 million primarily due to lower gathered volumes resulting from reduced producer activity and lower effective rates, partially offset by a one-time contract buyout by a customer of approximately $5.0 million.

Gathering operating expenses increased by $28.0 million for the nine months ended September 30, 2023 compared to the nine months ended September 30, 2022. Selling, general and administrative expenses increased by $28.3 million primarily due to higher personnel costs primarily attributable to expenses associated with the MVP PSU Program that included a cumulative catch-up of $8.4 million since the inception of the award and the Bonus. Operating and maintenance expenses decreased by $1.6 million primarily due to lower repairs and maintenance expenses, lower operating expenses associated with the divestiture of the regulated low pressure gathering assets in June 2023, partially offset by higher personnel costs and higher property taxes. Depreciation expense increased by $1.4 million as a result of additional assets placed in-service.

See "Outlook" for discussions of the EQT Global GGA, and the transactions related thereto, including periodic gathering MVC fees declines even if MVP would not achieve full in-service. Additionally, as discussed in "Outlook," in connection with MVP full in-service the EQT Global GGA provides for more significant potential gathering MVC fees declines in certain contract years. Firm reservation fee revenues under the Company’s Hammerhead gathering agreement with EQT are expected to contribute to an increase in the Company’s firm reservation fee revenues following achievement of the Hammerhead pipeline full commercial in-service in conjunction with full MVP in-service. However, the percentage of the Company's operating revenues that are generated by firm reservation fees may vary year to year depending on various factors, including customer volumes and the rates realizable under the Company’s contracts, including the EQT Global GGA. See also "Commodity Price Risk" in Part I, "Item 3. Quantitative and Qualitative Disclosures About Market Risk" of this Quarterly Report on Form 10-Q for additional information on factors that could affect the Company's operating revenues. Also, see Note 5 for further discussion on the MVP PSU Program.

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Transmission Results of Operations

	Three Months Ended September 30,					Nine Months Ended September 30,
	2023		2022		% Change	2023		2022		% Change
	(Thousands, except per day amounts)
FINANCIAL DATA
Firm reservation fee revenues	$	82,508	$	84,584	(2.5)	$	266,477	$	272,129	(2.1)
Volumetric-based fee revenues (a)	16,067		6,973		130.4	63,544		21,301		198.3
Total operating revenues	98,575		91,557		7.7	330,021		293,430		12.5
Operating expenses:
Operating and maintenance	13,559		4,143		227.3	42,305		15,973		164.9
Selling, general and administrative	15,204		9,428		61.3	42,739		26,270		62.7
Depreciation	14,004		13,909		0.7	41,796		41,707		0.2
Total operating expenses	42,767		27,480		55.6	126,840		83,950		51.1
Operating income	$	55,808	$	64,077	(12.9)	$	203,181	$	209,480	(3.0)
Equity income	$	73,810	$	48	153,670.8	$	97,618	$	91	107,172.5
Impairment of equity method investment	$	—	$	(583,057)	100.0	$	—	$	(583,057)	100.0
OPERATIONAL DATA
Transmission pipeline throughput (BBtu per day)
Firm capacity reservation	3,496		3,058		14.3	3,351		3,082		8.7
Volumetric-based services	14		65		(78.5)	15		41		(63.4)
Total transmission pipeline throughput	3,510		3,123		12.4	3,366		3,123		7.8
Average contracted firm transmission reservation commitments (BBtu per day)	3,515		3,748		(6.2)	3,765		4,009		(6.1)
Capital expenditures (b)	$	31,332	$	12,429	152.1	$	54,896	$	22,994	138.7

(a)For the nine months ended September 30, 2023, volumetric-based fee revenues included a one-time contract buyout by a customer for approximately $23.8 million.

(b)Transmission capital expenditures do not include aggregate capital contributions made to the MVP Joint Venture for the MVP and MVP Southgate projects of approximately $209.9 million and $280.5 million for the three and nine months ended September 30, 2023, respectively, and $46.4 million and $158.2 million for the three and nine months ended September 30, 2022, respectively.

Three Months Ended September 30, 2023 Compared to Three Months Ended September 30, 2022

Transmission operating revenues increased by $7.0 million for the three months ended September 30, 2023 compared to the three months ended September 30, 2022. Firm reservation fee revenues decreased by $2.1 million primarily due to lower contracted capacity payments resulting from the one-time contract buyout that occurred during the first quarter of 2023. Volumetric-based fee revenues increased $9.1 million primarily as a result of increased throughput volumes.

Operating expenses increased by $15.3 million for the three months ended September 30, 2023, compared to the three months ended September 30, 2022. Operating and maintenance expense increased $9.4 million primarily due to lower sales of over-recovered gas to third parties and to the Gathering segment for replenishment gas on the regulated low pressure gathering assets which were divested in June 2023, expenses associated with the Rager Mountain natural gas storage field incident and higher repairs and maintenance expenses. Selling, general and administrative expenses increased by $5.8 million largely due to higher personnel costs primarily attributable to the Bonus and higher professional fees.

Impairment of equity method investment reflects the impairment of the Company's equity method investment in the MVP Joint Venture during the third quarter of 2022. See Note 4 for further information.

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Nine Months Ended September 30, 2023 Compared to Nine Months Ended September 30, 2022

Transmission operating revenues increased by $36.6 million for the nine months ended September 30, 2023 compared to the nine months ended September 30, 2022. Firm reservation fee revenues decreased by $5.7 million primarily due to lower contracted capacity payments resulting from the one-time contract buyout included in volumetric-based fee revenues that occurred during the first quarter of 2023, partially offset by higher average reservation rates. Volumetric-based fee revenues increased $42.2 million primarily as a result of a one-time contract buyout by a customer of approximately $23.8 million and increased throughput volumes.

Operating expenses increased by $42.9 million for the nine months ended September 30, 2023 compared to the nine months ended September 30, 2022. Operating and maintenance expense increased $26.3 million primarily due to lower sales of over-recovered gas to third parties and to the Gathering segment for replenishment gas on the regulated low pressure gathering assets which were divested in June 2023, expenses associated with the Rager Mountain natural gas storage field incident, increased personnel costs, and higher repairs and maintenance expenses, partially offset by lower property taxes. Selling, general and administrative expenses increased $16.5 million resulting primarily from higher personnel costs primarily due to expenses associated with the MVP PSU Program that included a cumulative catch-up of $3.2 million since the inception of the award and the Bonus, an increased reserve for bad debt expense and higher professional fees.

Impairment of equity method investment reflects the impairment of the Company's equity method investment in the MVP Joint Venture during the third quarter of 2022. See Note 4 for further information.

In August 2023, the root cause analysis, which was conducted by an independent, third-party company with expertise in reservoir management and well and corrosion engineering, was submitted to the PHMSA, which root cause analysis indicated that the direct cause of the venting from the relevant Rager Mountain facility storage well (well #2244) was due to corrosion caused by the infiltration of water, oxygen and debris into the well's annulus, and such corrosion resulted in a failure of the well casing. Based on results of an inventory verification test conducted after the venting incident was resolved, the Company’s initial gas loss estimate for well #2244 was approximately 1.29 Bcf. Following completion of the root cause analysis, the cumulative gas loss was determined to be approximately 1.164 Bcf, approximately 1.037 Bcf of which was vented to the atmosphere and roughly 0.127 Bcf was diverted to and contained within formation(s) located at approximately 1,800’ and/or 3,000’ below ground. Post-incident workstreams related to the safe and environmentally responsible operation of the Rager Mountain facility and other storage fields are ongoing.

The Company worked with various third-party experts to identify and address the causes and/or contributors to the November 2022 incident. The damaged casing on well #2244 has been replaced, and the well remains temporarily plugged. It has not yet been determined whether the well will be permanently plugged or returned to service. Additionally, several other Rager wells have undergone top joint casing replacements to address proactively less-aggressive corrosion that was identified. The Company also has performed supplemental evaluations and testing, including updated wireline logging, on all other wells at the Rager Mountain facility. In October 2023, following authorization from PHMSA of the Company's injection plan for the Rager Mountain facility, the Company returned the Rager Mountain facility, other than well #2244 and two additional wells, to injection operations, subject to requirements specified in the consent agreement between the PHMSA and the Company. The Company is continuing and expects to continue to incur costs and expenses as a result of or arising in relation to the incident and future costs and expenses would be reflected in the Company's future Transmission operating results. For additional information, see Part II, "Item 1. Legal Proceedings" of this Quarterly Report on Form 10-Q. See also, "The November 2022 incident involving the venting of natural gas from a well at Equitrans, L.P.’s Rager Mountain natural gas storage facility required that we incur costs and expenses to halt such venting, and investigate and respond to the incident, including undertaking ongoing reviews of other storage assets. Activities and investigations responsive to the incident are ongoing, and, consequently, we are incurring and in the future we expect to incur further costs and expenses, whether resulting from or arising out of the incident, which could, depending on their scope and timing, materially adversely affect our business, financial condition, results of operations, liquidity and ability to pay dividends to our shareholders." included in Part I, "Item 1A. Risk Factors" in the Company's Annual Report on Form 10-K for the year ended December 31, 2022.

Equity income increased by $73.8 million for the three months ended September 30, 2023 compared to the three months ended September 30, 2022 and $97.5 million for the nine months ended September 30, 2023 compared to the nine months ended September 30, 2022, respectively, due to the increase in the MVP Joint Venture's AFUDC on the MVP project resulting from the resumption of growth construction activities. The Company's equity income in future periods will continue to be affected by the MVP project growth construction activities and associated AFUDC, and the timing of the completion of the MVP project, and such impact could continue to be substantial. See Note 4, "Outlook" below and Part II, "Item 1. Legal Proceedings" of this Quarterly Report on Form 10-Q for information on factors that have affected and/or, as applicable, could affect MVP project growth construction activities.

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Water Results of Operations

	Three Months Ended September 30,					Nine Months Ended September 30,
	2023		2022		% Change	2023		2022		% Change
	(Thousands, except MMgal amounts)
FINANCIAL DATA
Firm reservation fee revenues	$	11,029	$	9,375	17.6	$	29,793	$	24,502	21.6
Volumetric-based fee revenues	8,823		3,639		142.5	32,473		12,292		164.2
Total operating revenues	19,852		13,014		52.5	62,266		36,794		69.2
Operating expenses:
Operating and maintenance	5,666		3,280		72.7	18,965		12,818		48.0
Selling, general and administrative	9,782		2,230		338.7	13,620		5,956		128.7
Depreciation	6,655		5,162		28.9	19,029		14,483		31.4
Total operating expenses	22,103		10,672		107.1	51,614		33,257		55.2
Operating (loss) income	$	(2,251)	$	2,342	(196.1)	$	10,652	$	3,537	201.2
OPERATIONAL DATA
Water services volumes (MMgal)
Firm capacity reservation (a)	170		107		58.9	392		323		21.4
Volumetric-based services	188		96		95.8	707		358		97.5
Total water volumes	358		203		76.4	1,099		681		61.4
Capital expenditures	$	9,574	$	17,041	(43.8)	$	31,798	$	49,132	(35.3)

(a)    Includes volumes up to the contractual MVC under agreements structured with MVCs or ARCs, as applicable. Volumes in excess of the contractual MVC are reported under volumetric-based services.

Three Months Ended September 30, 2023 Compared to Three Months Ended September 30, 2022

Water operating revenues increased by $6.8 million for the three months ended September 30, 2023 compared to the three months ended September 30, 2022 as a result of increased volumetric-based fee revenues primarily due to higher volumes and higher average rates. Firm reservation fee revenues increased by $1.7 million primarily as a result of increased MVC revenues.

Water operating expenses increased by $11.4 million for the three months ended September 30, 2023 compared to the three months ended September 30, 2022. Selling, general and administrative expense increased $7.6 million primarily due to a contract asset write-down. Operating and maintenance expense increased $2.4 million due to higher pipeline expenses and higher purchased water costs as a result of increased activity and higher mixed-use water storage expenses related to storage facilities placed in-service during 2023. Depreciation expense increased $1.5 million due to additional assets placed in-service.

Nine Months Ended September 30, 2023 Compared to Nine Months Ended September 30, 2022

Water operating revenues increased by $25.5 million for the nine months ended September 30, 2023 compared to the nine months ended September 30, 2022. Firm reservation fee revenues increased by $5.3 million primarily as a result of increased revenues associated with ARCs associated with the 2021 Water Services Agreement that commenced in March 2022. Volumetric-based fee revenues increased by $20.2 million primarily due to higher volumes and higher average rates.

Water operating expenses increased by $18.4 million for the nine months ended September 30, 2023 compared to the nine months ended September 30, 2022. Selling, general and administrative expense increased $7.7 million primarily due to a contract asset write-down. Operating and maintenance expense increased $6.1 million due to higher mixed-use water storage expenses related to storage facilities placed in-service during the nine months ended September 30, 2023 and higher purchased water costs resulting from increased activity. Depreciation expense increased by $4.5 million due to additional assets placed in-service.

The Company’s volumetric-based water services are directly associated with producers’ well completion activities and fresh and produced water needs (which are primarily driven by horizontal lateral lengths and the number of completion stages per well). Therefore, the Water volumetric operating results traditionally fluctuate from year-to-year in response to producers’ well

27

completion activities. Firm reservation revenues are expected to be mostly consistent due to the ARC under the 2021 Water Services Agreement that became effective March 1, 2022. See "Outlook" for further discussion of the 2021 Water Services Agreement.

Other Income Statement Items

Other (Expense) Income, Net

Other (expense) income, net decreased by $5.5 million for the three months ended September 30, 2023 compared to the three months ended September 30, 2022. The decrease was primarily due to a $3.4 million unrealized loss on derivative instruments during the three months ended September 30, 2023, as compared to a $0.8 million unrealized loss on derivative instruments during the three months ended September 30, 2022, primarily due to the impact of changes in the targeted in-service date for the MVP project and changes in NYMEX Henry Hub natural gas futures prices associated with the Henry Hub cash bonus payment provision, as well as a $3.7 million gain on the sale of non-core gathering assets during the three months ended September 30, 2022.

Other (expense) income, net increased by $0.5 million for the nine months ended September 30, 2023 compared to the nine months ended September 30, 2022. The increase was primarily due to a $7.5 million unrealized gain on derivative instruments during the nine months ended September 30, 2023, as compared to a $4.5 million unrealized gain on derivative instruments during the nine months ended September 30, 2022, primarily due to changes in probability-weighted assumptions regarding MVP project completion, as well as changes in NYMEX Henry Hub natural gas futures prices associated with the Henry Hub cash bonus payment provision and sublease income, partially offset by a $3.7 million gain on the sale of non-core gathering assets during the nine months ended September 30, 2022.

See also "Outlook" for a discussion of factors affecting the estimated fair value of the derivative asset attributable to the Henry Hub cash bonus payment provision that is recognized in other income, net on the Company's statements of consolidated comprehensive income.

Loss on Extinguishment of Debt

During the nine months ended September 30, 2022, the Company incurred a loss on extinguishment of debt of approximately $24.9 million related to the 2022 Tender Offers for senior notes and open market repurchase premiums and fees, and write off of the respective unamortized discounts and financing costs associated with the purchase of portions of 2023, 2024 and 2025 Notes in such tender offers.

Net Interest Expense

Net interest expense increased by $5.2 million for the three months ended September 30, 2023 compared to the three months ended September 30, 2022 primarily due to increased interest rates and borrowings under the revolving credit facilities, partially offset by the redemption of the 2023 Notes effected in June 2023 and increased interest income.

Net interest expense increased by $25.6 million for the nine months ended September 30, 2023 compared to the nine months ended September 30, 2022 primarily due to interest on the senior notes issued in 2022 and increased interest rates and borrowings under the revolving credit facilities, partially offset by the impact of the 2022 Tender Offers.

See Note 6 and Note 10 for a discussion of certain of the Company's outstanding debt.

Income Tax Expense (Benefit)

See Note 9 for an explanation of the changes in income tax expense for the three and nine months ended September 30, 2023 compared to the three and nine months ended September 30, 2022.

Net Income Attributable to Noncontrolling Interest

Net income attributable to noncontrolling interest decreased by $0.7 million and $2.3 million for the three and nine months ended September 30, 2023, respectively, compared to the three and nine months ended September 30, 2022, respectively, as a result of lower net income on Eureka Midstream.

Capital Expenditures

See "Investing Activities" and "Capital Requirements" under "Capital Resources and Liquidity" for a discussion of capital expenditures and capital contributions.

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Outlook

The Company's strategically located assets overlay core acreage in the Appalachian Basin. The location of the Company's assets allows its producer customers to access major demand markets in the U.S. The Company is one of the largest natural gas gatherers in the U.S. and its largest customer, EQT, was one of the largest natural gas producers in the U.S. based on average daily sales volumes as of September 30, 2023 and EQT's public senior debt had investment grade credit ratings from Standard & Poor's Global Ratings (S&P), Fitch Ratings (Fitch) and Moody's Investors Service (Moody's) as of that date. During the nine months ended September 30, 2023, approximately 70% of the Company's operating revenues were generated from firm reservation fee revenues. Generally, the Company is focused on utilizing contract structures reflecting long-term firm capacity, MVC or ARC commitments which are intended to provide support to its cash flow profile. The percentage of the Company's operating revenues that are generated by firm reservation fees (as well as the Company's revenues generally) may vary year to year depending on various factors, including customer volumes and the rates realizable under the Company's contracts, including the EQT Global GGA which provides for periodic gathering MVC fees declines through January 1, 2028 (with the fees then remaining fixed throughout the remaining term), including if MVP would not achieve full in-service. Additionally, as discussed below, in connection with MVP full in-service the EQT Global GGA provides for more significant potential gathering MVC fees declines in certain contract years.

The Company's principal strategic aim is to achieve greater scale and scope, enhance the durability of its financial strength and to continue to work to position itself for a lower carbon economy, which the Company expects will drive future growth and investment. The Company’s strategy reflects its continued pursuit of its organic growth projects, including particularly the MVP given the Company’s belief that the MVP will, among other benefits, allow for greater natural gas production in the southwestern Appalachian Basin (and/or result in increased volumes flowing to the Company's gathering and transmission system given the Company's belief in the system's current unique positioning to provide the supply path to MVP), focusing on identifying opportunities to use its existing assets to deepen and grow its customer relationships at optimized levels of capital spending and taking into account the Company's leverage, and continuing to prudently invest resources in its sustainability-oriented initiatives. The Company is also continuing to focus on maintaining and strengthening its balance sheet. Additionally, the Company periodically evaluates strategically aligned inorganic growth opportunities (whether within its existing footprint or to extend the Company's reach into the southeast United States and to become closer to key demand markets, such as the Gulf of Mexico LNG export market).

As part of its approach to organic growth, the Company is focused on its projects and assets outlined below, many of which are supported by contracts with firm capacity, MVC or ARC commitments.

The Company expects that the MVP (should it be placed in-service), together with the Hammerhead pipeline and Equitrans, L.P. Expansion Project (EEP), will primarily drive the Company's organic growth, as discussed in further detail below. In addition, the Company continues to focus on de-levering its balance sheet (which the Company views as a critical strategic objective), including in connection with the MVP (should it be placed in-service).

•Mountain Valley Pipeline. The MVP is being constructed by a joint venture among the Company and affiliates of each of NextEra Energy, Inc. (NEE), Consolidated Edison, Inc. (Con Edison), AltaGas Ltd. and RGC Resources, Inc. (RGC). As of September 30, 2023, the Company owned an approximate 47.7% interest in the MVP project and will operate the MVP. The MVP is an estimated 300-mile, 42-inch diameter natural gas interstate pipeline with a targeted capacity of 2.0 Bcf per day that is designed to span from the Company's existing transmission and storage system in Wetzel County, West Virginia to Pittsylvania County, Virginia, which will provide access to the growing southeast demand markets. The MVP Joint Venture has secured a total of 2.0 Bcf per day of firm capacity commitments at 20-year terms. Additional shippers have expressed interest in the MVP project and the MVP Joint Venture is evaluating an expansion opportunity that could add approximately 0.5 Bcf per day of capacity through the installation of incremental compression.

In October 2017, the FERC issued the Certificate of Public Convenience and Necessity for the MVP. In the first quarter of 2018, the MVP Joint Venture received limited notice to proceed with certain construction activities from the FERC and commenced construction. However, as discussed in "The regulatory approval process for the construction of new midstream assets is very challenging, has significantly increased costs and delayed then-targeted in-service dates, and decisions by regulatory and judicial authorities in pending or potential proceedings, particularly with respect to litigation in the Fourth Circuit regarding MVP, are likely to impact our or the MVP Joint Venture's ability to obtain or maintain in effect all approvals and authorizations necessary to complete certain projects in a timely manner or at all, or our ability to achieve the expected investment returns on the projects." included in Part I, "Item 1A. Risk Factors" in the Company's Annual Report on Form 10-K for the year ended December 31, 2022, as well as in Part II, "Item 1. Legal Proceedings" of this Quarterly Report on Form 10-Q, the MVP project was

29

repeatedly, significantly delayed and subject to cost increases because of legal and regulatory setbacks, particularly in respect of litigation in the U.S. Court of Appeals for the Fourth Circuit (Fourth Circuit).

Notwithstanding such prior setbacks, the MVP Joint Venture continued to engage in pursuing the authorizations necessary under applicable law from the relevant agencies to complete the MVP project, including on February 28, 2023, the U.S. Department of the Interior’s Fish and Wildlife Service (FWS) issuing a new Biological Opinion and Incidental Take Statement (2023 BiOp) for the MVP project and in May 2023, the U.S. Forest Service and Bureau of Land Management issuing authorizations related to MVP’s segment in the Jefferson National Forest (JNF). In conjunction with the pursuit of outstanding authorizations, the Company urged the United States Congress to expeditiously pass, and for there to be enacted, federal energy infrastructure permitting reform legislation that specifically requires the completion of the MVP project.

On June 3, 2023, the President of the United States signed into law the Fiscal Responsibility Act of 2023 that, among other things, ratified and approved all permits and authorizations necessary for the construction and initial operation of the MVP, directed the applicable federal officials and agencies to maintain such authorizations, required the Secretary of the Army to issue not later than June 24, 2023 all permits or verifications necessary to complete construction of the MVP and allow for the MVP’s operation and maintenance, and divested courts of jurisdiction to review agency actions on approvals necessary for MVP construction and initial operation.

Thereafter, on June 8, 2023, the West Virginia Department of Environmental Protection issued a new Section 401 water quality certification for the MVP project, on June 23, 2023, the Huntington, Pittsburgh and Norfolk Districts of the U.S. Army Corps of Engineers issued the MVP Joint Venture an Individual Permit to effect approximately 300 water crossings utilizing open cut techniques, and, on June 28, 2023, the FERC authorized the MVP Joint Venture to resume all construction activities in all MVP project locations, including the remaining portion of the Exclusion Zone discussed in Part II, "Item 1. Legal Proceedings" of this Quarterly Report on Form 10-Q, and the MVP Joint Venture recommenced forward construction activity.

As further discussed in Part II, "Item 1. Legal Proceedings" of this Quarterly Report on Form 10-Q, project opponents continue to challenge MVP project-related authorizations. In connection with certain of such challenges, the Fourth Circuit issued a stay halting MVP project construction in the JNF and a stay of the 2023 BiOp, effectively halting forward construction for the entirety of the MVP project, on July 10, 2023 and July 11, 2023, respectively. The MVP Joint Venture subsequently filed an emergency application to vacate the stays with the U.S. Supreme Court and the U.S. Supreme Court vacated the stays on July 27, 2023. Accordingly, the MVP Joint Venture recommenced forward construction activity.

On October 18, 2023, the Company announced that following the MVP Joint Venture's comprehensive review of progress achieved since the resumption of forward construction in August 2023 and construction activity remaining for completion of the MVP project, the MVP Joint Venture refined the targeted timing for completing construction of the project from year-end 2023 to the first quarter of 2024, with the total project cost anticipated to be approximately $7.2 billion (excluding AFUDC), which includes approximately $120 million of contingency. Based on such targeted completion timing and following in-service authorization from the FERC, contractual obligations accordingly would commence on or before April 1, 2024.

Certain unforeseen factors have substantially affected the pace of construction and account for more than half of the increase in estimated project costs. The ramp up of MVP’s contractor workforce has been slower and more challenging than expected, due to multiple crews electing not to work on the project based on the history of court-related construction stops, and the inability to recruit crews with required and sufficient experience. Additionally, productivity and cost have been adversely affected in areas of challenging terrain and geology, in part because of the MVP Joint Venture’s commitment to, and application of, heightened environmental protocols. The MVP Joint Venture will continue to prioritize the safety of its workforce, communities, and assets, and the project’s compliance with applicable environmental standards and regulations.

The remaining increase in total project cost is attributable to a number of other factors, including certain financial settlements with contractors, labor and fuel inflation, and enhanced safety and security measures. While the remaining construction is subject to certain factors, including, among others, the physical construction conditions, crew availability, and productivity during the winter season, the MVP Joint Venture has made meaningful forward construction progress and construction will continue into the winter months, with the goal of responsibly completing the remaining construction activity and realizing the benefits of the MVP project for a diverse mix of stakeholders as promptly as practicable. Further adverse developments however, whatever the cause, affecting the MVP project could further increase project costs and/or further delay completion of the project, and adversely affect the Company. See

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also "Expanding our business by constructing new midstream assets subjects us to construction, regulatory, environmental, political and legal uncertainties that are beyond our control." included in Part I, "Item 1A. Risk Factors" of the Company's Annual Report on Form 10-K for the year ended December 31, 2022. See also Part II, "Item 1. Legal Proceedings" of this Quarterly Report on Form 10-Q.

On November 4, 2019, Con Edison exercised an option to cap its investment in the construction of the MVP project at approximately $530 million (excluding AFUDC). On May 4, 2023, RGC exercised an option for the Company to fund RGC’s portion of future capital contributions with respect to the MVP project, which funding the Company commenced in June 2023 and will continue through the full in-service date of the MVP. The Company and NEE are obligated, and RGC prior to the exercise of its option described above had opted, to fund the shortfall in Con Edison's capital contributions on a pro rata basis. Following RGC’s exercise of its option, the Company is also funding RGC’s portion of Con Edison’s shortfall. Such funding by the Company in respect of the Con Edison shortfall and RGC’s portion of capital contributions has and will correspondingly increase the Company's interests in the MVP project and decrease Con Edison's and RGC’s respective interest, as applicable, in the MVP project. If the project were to be completed in the first quarter of 2024 and at a total project cost of approximately $7.2 billion (excluding AFUDC), the Company expects its equity ownership in the MVP project would progressively increase from approximately 47.7% to approximately 48.8%.

Through September 30, 2023, the Company had funded approximately $3.0 billion to the MVP Joint Venture for the MVP project. If the MVP project were to be completed in the first quarter of 2024 and at a total project cost of approximately $7.2 billion (excluding AFUDC), the Company expects it would make total capital contributions to the MVP Joint Venture in 2023 of approximately $725 million to $745 million primarily related to forward construction, and expects that it would incur a total of approximately $3.7 billion over the project's construction, inclusive of approximately $220 million in excess of the Company's ownership interest.

•Wellhead Gathering Expansion Projects and Hammerhead Pipeline. During the nine months ended September 30, 2023, the Company invested approximately $199.2 million in gathering projects (inclusive of capital expenditures related to the noncontrolling interest in Eureka Midstream). For 2023, the Company expects to invest approximately $255 million to $275 million in gathering projects (inclusive of expected capital expenditures of approximately $15 million related to the noncontrolling interest in Eureka Midstream). The primary projects include infrastructure expansion and optimization in core development areas in the Marcellus and Utica Shales in southwestern Pennsylvania, southeastern Ohio and northern West Virginia for EQT, Range Resources Corporation (Range Resources) and other producers. The Company has seen and expects that it will continue to see the benefits of return-to-pad drilling and system integrations in 2023, and accordingly, continues to estimate gathering capital expenditures required to maintain flat gathered volumes in a given year would be approximately $200 million for 2023.

The Hammerhead pipeline is a 1.6 Bcf per day gathering header pipeline that is primarily designed to connect natural gas produced in Pennsylvania and West Virginia to the MVP, Texas Eastern Transmission and Eastern Gas Transmission, is supported by a 20-year term, 1.2 Bcf per day, firm capacity commitment from EQT, and costs approximately $540 million. The Company expects Hammerhead pipeline full commercial in-service to commence in conjunction with full MVP in-service and is focused on obtaining additional firm capacity commitments for the pipeline.

The Company also has an agreement with a producer customer to install approximately 32,000 horsepower booster compression to existing facilities. The project is backed by a long-term firm commitment and is targeted to be in-service in early 2024. The Company expects to invest approximately $60 million, with a majority of the capital spend in 2023, which is reflected within the range of 2023 investments for gathering projects noted above, and 2024.

•Transmission Projects and Equitrans Expansion Project. During the nine months ended September 30, 2023, the Company invested approximately $54.9 million in transmission projects. For 2023, the Company expects to invest approximately $80 million to $90 million in transmission projects. This includes an estimate of $5 million to $10 million of capital expenditures related to the Rager Mountain natural gas storage field incident based on current information. The $80 million to $90 million of expected investment in transmission projects also includes capital expenditures expected for 2023 associated with the Company's Ohio Valley Connector expansion project (OVCX). The Company expects OVCX will increase deliverability on the Company's existing Ohio Valley Connector pipeline (OVC) by approximately 350 MMcf per day, create new receipt and delivery transportation paths, and enhance long-term reliability. The project is supported by new long-term firm capacity commitments of 330 MMcf per day, as well as an extension of approximately 1.0 Bcf per day of existing contracted mainline capacity for EQT. OVCX is designed to meet growing demand in key markets in the mid-continent and gulf coast through existing interconnects with long-haul pipelines in Clarington, Ohio. On January 20, 2023, the FERC issued the Final Environmental Impact Statement

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for the project. On June 15, 2023, the FERC issued the Certificate of Public Convenience and Necessity for OVCX. On July 31, 2023, the FERC issued the Notice to Proceed and the Company commenced construction during the third quarter. The Company is targeting the incremental capacity to be in-service during the first half of 2024. The Company expects to invest approximately $160 million in the project, including approximately $60 million in 2023. The OVCX project, as well as the Company's recent successful open season for the available transmission capacity that was the subject of the one-time transmission customer's contract buyout during the first quarter of 2023, is consistent with the Company's ongoing efforts to optimize existing assets and achieve capital efficiency.

The EEP is one of the Company's transmission projects and is designed to provide north-to-south capacity on the mainline Equitrans, L.P. system, including primarily for deliveries to the MVP. A portion of the EEP commenced operations with interruptible service in the third quarter of 2019. The EEP provides capacity of approximately 600 MMcf per day and offers access to several markets through interconnects with Texas Eastern Transmission, Eastern Gas Transmission and Columbia Gas Transmission. In connection with MVP full in service, firm transportation agreements for 550 MMcf per day of capacity will commence under 20-year terms.

•MVP Southgate Project. In April 2018, the MVP Joint Venture announced the MVP Southgate project, which is a contemplated interstate pipeline that was approved by the FERC to extend approximately 75 miles from the MVP at Pittsylvania County, Virginia to new delivery points in Rockingham and Alamance Counties, North Carolina. The Company is expected to operate the MVP Southgate project and owned a 47.2% interest in the MVP Southgate project as of September 30, 2023. The MVP Southgate project, as originally designed, was estimated to cost a total of approximately $450 million to $500 million, a portion of which the Company expected to fund.

The MVP Joint Venture submitted the MVP Southgate certificate application to the FERC in November 2018. In June 2020, the FERC issued the Certificate of Public Convenience and Necessity (MVP Southgate Certificate) for the MVP Southgate; however, the FERC, while authorizing the project, directed the Office of Energy Projects not to issue a notice to proceed with construction until necessary federal permits are received for the MVP project and the Director of the Office of Energy Projects lifts the stop work order and authorizes the MVP Joint Venture to continue constructing the MVP project. The FERC conditioned its authorization on the MVP Southgate project being built and made available for service by June 18, 2023. On June 15, 2023, the MVP Joint Venture filed a request with the FERC for an extension of time to June 18, 2026 to complete the MVP Southgate. The public comment period in respect of such request ended July 24, 2023, with various parties commenting on the request, and the request is pending. In addition, there have been certain other litigation and regulatory-related delays affecting completion of the MVP Southgate project, including on August 11, 2020, the North Carolina Department of Environmental Quality denied the MVP Southgate project's application for a Clean Water Act Section 401 Individual Water Quality Certification and Jordan Lake Riparian Buffer Authorization due to then existing legal and regulatory uncertainty surrounding the completion of the MVP project, which denial was reissued in April 2021 following an appellate proceeding. On December 3, 2021, the Virginia State Air Pollution Control Board denied the permit for the MVP Southgate project’s Lambert compressor station, which decision the MVP Joint Venture initially appealed before withdrawing its request to review the denial.

The MVP Joint Venture continues to engage with Dominion Energy North Carolina and a prospective customer regarding refining the MVP Southgate project’s design, scope and/or timing for the benefit of such customers in lieu of pursuing the project as originally contemplated. Dominion Energy North Carolina’s obligations under the precedent agreement in support of the original project are subject to certain conditions, including, among others, that the MVP Joint Venture will have completed construction of the project facilities by December 31, 2023. The Company is unable to ensure the results of the continued engagement between the MVP Joint Venture and Dominion Energy North Carolina and the other prospective customer, including the ultimate design, scope, timing, undertaking or completion of the project.

•Water Operations. During the nine months ended September 30, 2023, the Company invested approximately $31.8 million in its water infrastructure, primarily to continue to construct the initial mixed-use water system buildout. The Company placed portions of the initial mixed-use water system in service during 2022 and its second above ground water storage facility into service in July 2023, which brings its total water storage capacity to 350,000 barrels. The backbone of the mixed-use water system is expected to be substantially completed in 2023. In May 2023, the Company executed an agreement with a producer customer to provide fresh and mixed use water delivery service. The Company expects to invest approximately $30 million, primarily across 2023 and 2024, to complete the project build out. The 10-year agreement is backed by a minimum volume commitment. For 2023, the Company expects to invest approximately $45 million, primarily related to the continued construction of its mixed-use water system buildout.

See further discussion of capital expenditures in the "Capital Requirements" section below.

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EQT Global GGA. On February 26, 2020 (the EQT Global GGA Effective Date), the Company entered into a Gas Gathering and Compression Agreement (as subsequently amended, the EQT Global GGA) with EQT and certain affiliates of EQT for the provision by the Company of certain gas gathering services to EQT in the Marcellus and Utica Shales of Pennsylvania and West Virginia. The EQT Global GGA is intended to, among other things, incentivize combo and return-to-pad drilling by EQT. Pursuant to the EQT Global GGA, EQT is subject to an initial annual MVC of 3.0 Bcf per day that gradually steps up to 4.0 Bcf per day through December 2031 following the full in-service date of the MVP (should it be placed in-service) and the dedication of a substantial majority of EQT's core acreage in southwestern Pennsylvania and West Virginia. The EQT Global GGA runs from the EQT Global GGA Effective Date through December 31, 2035, and will renew annually thereafter unless terminated by EQT or the Company pursuant to its terms. Pursuant to the EQT Global GGA, the Company has certain obligations to build connections to connect EQT wells to its gathering system, which are subject to limitations, including geographical in relation to the dedicated area, as well as the distance of such connections to the Company's then-existing gathering system, which have provided and could further provide capital efficiencies to EQM. In addition to the fees related to gathering services, the EQT Global GGA provides for potential cash bonus payments payable by EQT to the Company during the period beginning on the first day of the calendar quarter in which the MVP full in-service date occurs through the calendar quarter ending December 31, 2024 (the Henry Hub cash bonus payment provision). The potential cash bonus payments are conditioned upon the quarterly average of certain Henry Hub natural gas prices exceeding certain price thresholds.

Under the EQT Global GGA, the performance obligation is to provide daily MVC capacity and as such the total consideration is allocated proportionally to the daily MVC over the life of the contract. In periods that the gathering MVC revenue billed will exceed the allocated consideration, the excess will be deferred to the contract liability and recognized in revenue when the performance obligation has been satisfied. While the 3.0 Bcf per day MVC capacity became effective on April 1, 2020, additional daily MVC capacity and the associated gathering MVC fees payable by EQT to the Company as set forth in the EQT Global GGA are conditioned upon the full in-service date of the MVP. The performance obligation, the allocation of the total consideration over the life of the contract and the gathering MVC fees payable by EQT under the contract have been in the past, and in the future could be, affected by changes in the potential timing of the full in-service date of the MVP.

Under the EQT Global GGA, the gathering MVC fees periodically decline through January 1, 2028 (with the fees then remaining fixed throughout the remaining term), including if MVP would not achieve full in-service. Before January 1, 2026, beginning the first day of the quarter in which the full in-service date of the MVP occurs under the EQT Global GGA, the gathering MVC fees payable by EQT to the Company are subject to more significant potential declines for certain contract years as set forth in the EQT Global GGA, which, prior to EQT's exercise of the EQT Cash Option (defined below), provided for estimated aggregate fee relief of up to approximately $270 million in the first twelve-month period, up to approximately $230 million in the second twelve-month period and up to approximately $35 million in the third twelve-month period. Given that the MVP full in-service date did not occur by January 1, 2022, on July 8, 2022, EQT irrevocably elected under the EQT Global GGA to forgo up to approximately $145 million of the potential gathering MVC fee relief in such first twelve-month period and up to approximately $90 million of the potential gathering MVC fee relief in such second twelve-month period in exchange for a cash payment from the Company to EQT in the amount of approximately $195.8 million (the EQT Cash Option). As a result of EQT exercising the EQT Cash Option (and payment by the Company thereof), the maximum aggregate potential fee relief applicable under the EQT Global GGA in such first twelve-month period and such second twelve-month period was reduced to be up to approximately $125 million and $140 million, respectively. The gathering MVC fees and potential declines are subject to certain provisions related to inflation adjustment in accordance with the terms of the EQT Global GGA, including if MVP would not achieve full in-service. Additionally, the EQT Global GGA provides for a fee credit to the gathering rate for certain gathered volumes that also receive separate transmission services under certain transmission contracts.

Based on the Henry Hub natural gas forward strip prices as of October 27, 2023 and the terms of the Henry Hub cash bonus payment provision, any further delays in the full in-service date for the MVP project and, if applicable, corresponding changes to probability-weighted assumptions regarding the project completion could decrease the estimated fair value of the derivative asset attributable to the Henry Hub cash bonus payment provision, and such decrease may be substantial and ultimately be reduced to zero. For a discussion of the potential effect of hypothetical changes to the NYMEX Henry Hub natural gas future prices on the estimated fair value of the derivative asset attributable to the Henry Hub cash bonus payment provision, see "Commodity Price Risk" in Part I, "Item 3. Quantitative and Qualitative Disclosures About Market Risk" of this Quarterly Report on Form 10-Q. Changes in estimated fair value are recognized in other income, net, on the Company’s statements of consolidated comprehensive income.

2021 Water Services Agreement. On October 22, 2021, the Company and EQT entered into a new 10-year, mixed-use water services agreement covering operations within a dedicated area in southwestern Pennsylvania. The 2021 Water Services

Agreement became effective on March 1, 2022. Pursuant to the 2021 Water Services Agreement, EQT has agreed to pay the Company a minimum ARC for water services equal to $40 million in each of the first five years of the 10-year contract term and equal to $35 million per year for the remaining five years of the contract term.

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For a discussion of the Company's commercial relationship with EQT and related considerations, including risk factors, see Part I, "Item 1A. Risk Factors" in the Company's Annual Report on Form 10-K for the year ended December 31, 2022. For further discussion of the MVP project, see "Outlook" above and Part II, "Item 1. Legal Proceedings" of this Quarterly Report on Form 10-Q.

Potential Future Impairments. The accounting estimates related to impairments are susceptible to change, including estimating fair value which requires considerable judgment. For goodwill, management’s estimate of a reporting unit’s future financial results is sensitive to changes in assumptions, such as changes in stock prices, weighted-average cost of capital, terminal growth rates and industry multiples. Similarly, cash flow estimates utilized for purposes of evaluating long-lived assets and equity method investment (such as in the MVP Joint Venture) require the Company to make projections and assumptions for many years into the future for pricing, demand, competition, operating costs, commencement (or recommencement, as applicable) of operations and timing thereof (if at all), resolution of relevant legal and regulatory matters, and other factors. The Company evaluates long-lived assets and equity method investments for impairment when events or changes in circumstances indicate, in management’s judgment, that the carrying value of such assets may not be recoverable (meaning, in the case of its equity method investment, that such investment has suffered other-than-temporary declines in value under ASC 323). The Company believes the estimates and assumptions used in estimating its reporting units’, its long-lived assets' and its equity method investment's fair values are reasonable and appropriate as of September 30, 2023; however, assumptions and estimates are inherently subject to significant business, economic, competitive, regulatory, judicial, construction and other risks that could materially affect the calculated fair values and the resulting conclusions regarding impairments, which could materially affect the Company’s results of operations and financial position. Additionally, actual results could differ from these estimates and assumptions may not be realized. When estimating the fair value of its equity method investment, the Company utilizes an income approach under which significant judgments and assumptions, including the discount rate and probability-weighted scenarios, are sensitive to change. The Company also continues to monitor the progress of the MVP project and to monitor the MVP Southgate project. Future adverse developments, as well as potential macroeconomic factors, including other than temporary market fluctuations, changes in interest rates, cost increases and other unanticipated events, could require that the Company further modify assumptions reflected in the probability-weighted scenarios of discounted future net cash flows (including with respect to the probability of success) utilized to estimate the fair value of its equity method investment in the MVP Joint Venture, which could result in an other-than-temporary decline in value, resulting in an incremental impairment of that investment. While macroeconomic factors in and of themselves may not be a direct indicator of impairment, should an impairment indicator be identified in the future, macroeconomic factors such as changes in interest rates could ultimately impact the size and scope of any potential impairment. The Company cannot predict the likelihood or magnitude of any future impairment. See “Impairments of our assets, including property, plant, and equipment, intangible assets, goodwill and our equity method investment in the MVP Joint Venture, previously have significantly reduced our earnings, and additional impairments could further reduce our earnings.” included in Part I, “Item 1A. Risk Factors" and the Company's discussion of "Critical Accounting Estimates" included in "Outlook" in Part II, "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations," each in the Company's Annual Report on Form 10-K for the year ended December 31, 2022.

For a discussion of capital expenditures, see "Capital Requirements" under "Capital Resources and Liquidity" below.

Capital Resources and Liquidity

The Company's liquidity requirements are to finance its operations, its capital expenditures, potential acquisitions and other strategic transactions and capital contributions to joint ventures, including the MVP Joint Venture, to pay cash dividends and distributions, when declared, and to satisfy any indebtedness obligations. Additionally, the Company or its affiliates may, at any time and from time to time, seek to retire or purchase outstanding debt through cash purchases and/or exchanges for equity or debt, in open-market purchases, privately negotiated transactions or otherwise. Such repurchases or exchanges, if any, will be upon such terms and at such prices as the Company may determine, and will depend on prevailing market conditions, the Company's other liquidity requirements, contractual restrictions and other factors and the amounts involved may be material. The Company's ability to meet these liquidity requirements depends on the Company's cash flow from operations, the continued ability of the Company to borrow under its subsidiaries' credit facilities and the Company's ability to raise capital in banking and capital markets. We believe that our cash on hand, future cash generated from operations and future cash received from potential distributions from the MVP Joint Venture, together with available borrowing capacity under our subsidiaries' credit facilities and our access to banking and capital markets, will provide adequate resources to fund our short-term and long-term capital, operating and financing needs. However, cash flow and capital raising activities may be affected by prevailing economic conditions in the natural gas industry and other financial and business factors, including factors discussed in Part I, "Item 1A. Risk Factors" in the Company's Annual Report on Form 10-K for the year ended December 31, 2022 (such as those market forces discussed in “Our business is subject to climate change-related transitional risks (including evolving climate-focused regulation and climate change-driven trends emphasizing financing non-fossil fuel businesses and prompting pursuit of emissions reductions, lower-carbon technologies and alternative forms of energy) and physical risks that could

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significantly increase our operating expenses and capital costs, adversely affect our customers’ development plans, and reduce demand for our products and services."), some of which are beyond the Company's control. The Company's available sources of liquidity include cash from operations, cash on hand, borrowings under its subsidiaries' revolving credit facilities, issuances of additional debt and issuances of additional equity securities. The amount the Company is able to borrow under the Amended EQM Credit Facility is bounded by a maximum Consolidated Leverage Ratio. Effective as of the MVP Mobilization Effective Date, as defined in the Amended EQM Credit Facility, the maximum Consolidated Leverage Ratio permitted with respect to the fiscal quarter ending December 31, 2023 and the end of each of EQM’s three consecutive fiscal quarters thereafter is 5.85 to 1.00, with the then-applicable ratio being tested as of the end of each fiscal quarter. As of the MVP Mobilization Effective Date, as defined in the Amended EQM Credit Facility, EQM expects to have the ability to borrow approximately $0.6 billion under the Amended EQM Credit Facility. See Note 6 for further information regarding the Amended EQM Credit Facility. See also "Our subsidiaries’ significant indebtedness, and any future indebtedness, as well as the restrictions under our subsidiaries’ debt agreements, could adversely affect our operating flexibility, business, financial condition, results of operations, liquidity and ability to pay dividends to our shareholders." included in Part I, "Item 1A. Risk Factors" of the Company's Annual Report on Form 10-K for the year ended December 31, 2022.

See “Security Ratings” below for a discussion of EQM’s credit ratings during 2023. Based on EQM's credit rating levels, EQM has delivered credit support to the MVP Joint Venture in the form of a letter of credit, which is for the MVP project, and was in the amount of approximately $219.7 million as of September 30, 2023, which is subject to adjustment based on the applicable construction budget. See Note 4 for further information. See "A further downgrade of EQM’s credit ratings, which are determined by independent third parties, could impact our liquidity, access to capital, and costs of doing business." included in Part I, "Item 1A. Risk Factors" in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022.

The following table is a summary of the cash flows by activity for the nine months ended September 30, 2023 and 2022, respectively.

	Nine Months Ended September 30,
	2023		2022
	(Thousands)
Cash flows
Net cash provided by operating activities	$	724,860	$	746,539
Net cash used in investing activities	(555,587)		(427,177)
Net cash used in financing activities	(56,562)		(405,956)
Net increase (decrease) in cash and cash equivalents	$	112,711	$	(86,594)

Operating Activities

Net cash flows provided by operating activities decreased approximately $21.7 million for the nine months ended September 30, 2023 as compared to the nine months ended September 30, 2022. The decrease was primarily driven by higher interest payments and the timing of other working capital receipts and payments.

Investing Activities

Net cash flows used in investing activities increased by approximately $128.4 million for the nine months ended September 30, 2023 as compared to the nine months ended September 30, 2022. The increase was primarily due to an increase in capital contributions to the MVP Joint Venture. As construction of the MVP project continues, through completion of the project, the Company expects higher investing cash outflows as a result of higher capital contributions to the MVP Joint Venture. See “Capital Requirements” below for a discussion of forecasted 2023 capital expenditures and capital contributions to the MVP Joint Venture.

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Financing Activities

Net cash flows used in financing activities decreased by $349.4 million for the nine months ended September 30, 2023 as compared to the nine months ended September 30, 2022. For the nine months ended September 30, 2023, the primary uses of financing cash flows were repayments on borrowings under the revolving credit facilities, the payments of dividends to shareholders, the redemption of the 2023 Notes and distributions paid to noncontrolling interest, while the primary source of financing cash flows were borrowings under the revolving credit facilities. For the nine months ended September 30, 2022, the primary uses of financing cash flows were the purchase of certain tranches of EQM's outstanding long-term indebtedness pursuant to the 2022 Tender Offers and an open market purchase, repayments on borrowings under the revolving credit facilities, and the payments of dividends to shareholders, while the primary source of financing cash flows were the issuance of the 2022 Senior Notes and borrowings under the revolving credit facilities. As construction of the MVP project continues, through the completion of the project, the Company expects higher financing cash flows as a result of higher borrowings under its Amended EQM Credit Facility.

Capital Requirements

The gathering, transmission and storage and water services businesses are capital intensive, requiring significant investment to develop new facilities and to maintain and upgrade existing operations.

Capital expenditures in 2023 are expected to be approximately $380 million to $410 million (including approximately $15 million attributable to the noncontrolling interest in Eureka Midstream). The Company expects to make total capital contributions to the MVP Joint Venture in 2023 of approximately $725 million to $745 million primarily related to forward construction of the MVP project. Capital contributions payable to the MVP Joint Venture are accrued upon the issuance of a capital call by the MVP Joint Venture. The Company's short-term and long-term capital investments may vary significantly from period to period based on the available investment opportunities, the timing of the construction of the MVP and other projects, and maintenance needs. The Company expects to fund short-term and long-term capital expenditures and capital contributions primarily through cash on hand, cash generated from operations, available borrowings under its subsidiaries' credit facilities and its access to banking and capital markets.

Credit Facility Borrowings

See Note 6 for a discussion of the Amended EQM Credit Facility and the 2021 Eureka Credit Facility.

Security Ratings

The table below sets forth the credit ratings for EQM's debt instruments at September 30, 2023.

	EQM Senior Notes
Rating Service	Rating	Outlook
Moody's	Ba3	Stable
S&P	BB-	Negative
Fitch	BB	N/A

On August 29, 2023, Fitch affirmed EQM's credit rating on Rating Watch Positive. EQM's credit ratings are subject to revision or withdrawal at any time by the assigning rating organization, and each rating should be evaluated independently of any other rating. The Company cannot ensure that a rating will remain in effect for any given period of time or that a rating will not be lowered or withdrawn entirely by a credit rating agency if, in its judgment, circumstances so warrant. If any credit rating agency downgrades or withdraws EQM's ratings, including for reasons relating to the MVP project (such as delays affecting the MVP project or increases in such project’s targeted costs), EQM’s leverage or credit ratings of the Company's customers, the Company's access to the capital markets could become more challenging, borrowing costs will likely increase, the Company may, depending on contractual provisions in effect at such time, be required to provide additional credit assurances (the amount of which may be substantial) and the potential pool of investors and funding sources may decrease. In order to be considered investment grade, a company must be rated Baa3 or higher by Moody's, BBB- or higher by S&P, or BBB- or higher by Fitch. All of EQM's credit ratings are considered non-investment grade.

Commitments and Contingencies

From time to time, various legal and regulatory claims and proceedings are pending or threatened against the Company and its subsidiaries. While the amounts claimed may be substantial, the Company is unable to predict with certainty the ultimate outcome of such claims and proceedings. The Company accrues legal and other direct costs related to loss contingencies when

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incurred. The Company establishes reserves whenever it believes it to be appropriate for pending matters. Furthermore, after consultation with counsel and considering the availability, if any, of insurance, the Company believes, although no assurance can be given, that the ultimate outcome of any matter currently pending against it or any of its consolidated subsidiaries will not materially adversely affect its business, financial condition, results of operations, liquidity or ability to pay dividends to its shareholders.

See "The regulatory approval process for the construction of new midstream assets is very challenging, has significantly increased costs and delayed then-targeted in-service dates, and decisions by regulatory and judicial authorities in pending or potential proceedings, particularly with respect to litigation in the Fourth Circuit regarding MVP, are likely to impact our or the MVP Joint Venture's ability to obtain or maintain in effect all approvals and authorizations necessary to complete certain projects in a timely manner or at all or our ability to achieve the expected investment returns on the projects." and "The November 2022 incident involving the venting of natural gas from a well at Equitrans, L.P.'s Rager Mountain natural gas storage facility required that we incur costs and expenses to halt such venting, and investigate and respond to the incident, including undertaking ongoing reviews of other storage assets. Activities and investigations responsive to the incident are ongoing, and, consequently, we are incurring and in the future we expect to incur further costs and expenses, whether resulting from or arising out of the incident, which could, depending on their scope and timing, materially adversely affect our business, financial condition, results of operations, liquidity and ability to pay dividends to our shareholders." included in Part I, "Item 1A. Risk Factors" of the Company's Annual Report on Form 10-K for the year ended December 31, 2022. See also Part II, "Item 1. Legal Proceedings" of this Quarterly Report on Form 10-Q for a discussion of certain litigation and regulatory proceedings, including related to the MVP project and the Rager Mountain natural gas storage field incident.

See Note 15 to the consolidated financial statements included in the Company's Annual Report on Form 10-K for the year ended December 31, 2022 for further discussion of the Company's commitments and contingencies.

Dividends

On October 25, 2023, the Company's Board of Directors declared cash dividends for the third quarter of 2023 of $0.15 per common share and $0.4873 per Equitrans Midstream Preferred Share to shareholders of record at the close of business on November 3, 2023.

Critical Accounting Estimates

The Company's critical accounting policies are described in Part II, "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations" contained in the Company's Annual Report on Form 10-K for the year ended December 31, 2022. Any new accounting policies or updates to existing accounting policies as a result of new accounting pronouncements have been included in the notes to the Company's consolidated financial statements in Part I, "Item 1. Financial Statements" of this Quarterly Report on Form 10-Q. Preparation of financial statements requires management to make estimates and assumptions that affect the reported amounts in the Company's consolidated financial statements and accompanying notes. The Company's critical accounting policies are considered critical due to the significant judgments and estimates used in the preparation of the Company's consolidated financial statements and the material impact on the results of operations or financial condition. Actual results could differ from those judgments and estimates.

Item 3. Quantitative and Qualitative Disclosures About Market Risk

Except for Commodity Price Risk and Credit Risk described below, information about market risks for the nine months ended September 30, 2023, does not differ materially from that discussed under Part II, "Item 7A." of the Company's Annual Report on Form 10-K for the year ended December 31, 2022, as updated for the nine months ended September 30, 2023.

Commodity Price Risk. The Company's business is dependent on continued natural gas production and the availability and development of reserves in its areas of operation. Prices for natural gas and NGLs, including regional basis differentials, have previously adversely affected, and may in the future adversely affect, timing of development of additional reserves and production that is accessible by the Company’s pipeline and storage assets, which also negatively affects the Company’s water services business, and the creditworthiness of the Company’s customers.

As of October 27, 2023, the natural gas forward price strip reflected significantly lower Henry Hub and Appalachian Basin natural gas prices for the remainder of 2023 relative to prices in the fourth quarter of 2022. Lower natural gas prices, particularly in the Appalachian region, have in the past caused, and may in the future cause, producers such as EQT to determine to take actions to slow production growth and/or maintain flat or reduce production, which when effected by our producer customers limits growth in or may reduce the demand for, and usage of, our services. For instance, in certain periods of low natural gas prices prior to 2023, temporary production curtailments resulted in a decrease in our volumetric-based

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gathering fee revenues. Based on such forward price strip, the Company perceives continued risk that EQT and/or other producers could curtail production in 2023, which, depending on the nature and duration of any such curtailment, could have a significant negative effect on the demand for our services, our volumetric-based fee revenue, and therefore our results of operations. See also “Decreases or a lack of growth in production of natural gas in our areas of operation, whether as a result of regional takeaway constraints, producer corporate capital allocation strategies, lower regional natural gas prices, natural well decline, and/or other factors, have adversely affected, and in the future could adversely affect, our business and operating results and reduce our cash available to pay cash dividends to our shareholders.”, "The lack of diversification of our assets and geographic locations could adversely affect us." and “We generate a substantial majority of our revenues from EQT. Therefore, we are subject to the business and liquidity risks of EQT, and any decrease in EQT's drilling or completion activity (or significant production curtailments) or a shift in such activity away from our assets could adversely affect our business and operating results. Various factors have affected and may further affect our ability to realize the benefits associated with the EQT Global GGA at the time of its execution.”, each included in Part I, "Item 1A. Risk Factors" in the Company's Annual Report on Form 10-K for the year ended December 31, 2022.

Price declines and sustained periods of low natural gas and NGL prices could have an adverse effect on the creditworthiness of the Company's customers and related ability to pay firm reservation fees under long-term contracts and/or affect, as discussed above, activity levels and, accordingly, volumetric-based fees, which could affect the Company’s results of operations, liquidity or financial position. Credit risk and related management is further discussed under “Credit Risk” in Part I, “Item 3. Quantitative and Qualitative Disclosures About Market Risk” of this Quarterly Report on Form 10-Q.

Increases in natural gas prices do not necessarily result in corresponding increases to the production forecasts of the Company's customers. Even when natural gas prices have been commercially attractive, certain of the Company's customers maintained largely flat production forecasts in light of, among other things, the absence of incremental takeaway capacity from the Appalachian Basin and the Company's customers may still maintain flat or modest increases to production forecasts based on various factors, which could include regional takeaway capacity limitations, access to capital, investor expectations regarding free cash flow, a desire to reduce or refinance leverage or other factors.

Additionally, lower natural gas prices (including regionally), corporate capital allocation strategies or regional takeaway constraints, could cause producers to determine in the future that drilling activities in areas outside of the Company's current areas of operation are strategically more attractive to them.

Many of the Company’s customers, including EQT, have entered into long-term firm reservation gathering, transmission and water services contracts or contracts with MVCs or ARCs, as applicable, on the Company's systems and approximately 70% of the Company's operating revenues for the nine months ended September 30, 2023 was generated by firm reservation fee revenues. The Company believes that such contract structure is advantageous to its overall business, although significant declines in gas production in the Company's areas of operations would likely adversely affect the Company's results of operations, financial condition and liquidity as approximately 30% of the Company’s operating revenues for the nine months ended September 30, 2023 was generated by volumetric-based fee revenues. See "Our exposure to direct commodity price risk may increase in the future and NYMEX Henry Hub futures prices affect the fair value, and may affect the realizability, of potential cash payments to us by EQT pursuant to the EQT Global GGA." and “We generate a substantial majority of our revenues from EQT. Therefore, we are subject to business and liquidity risks of EQT, and any decrease in EQT’s drilling or completion activity (or significant production curtailments) or a shift in such activity away from our assets could adversely affect our business and operating results. Various factors have affected and may further affect our ability to realize the benefits associated with the EQT Global GGA at the time of its execution." included in Part I, "Item 1A. Risk Factors" in the Company's Annual Report on Form 10-K for the year ended December 31, 2022.

Unless the Company is successful in attracting and retaining new customers, the Company's ability to maintain or increase the capacity subscribed and volumes transported, gathered or provided on its systems above MVC levels will be dependent on receiving consistent or increasing commitments and production from its existing customers, which may be impacted by regional takeaway capacity limitations, commodity prices, including regional commodity prices and/or other factors, including corporate capital allocation strategies. While EQT has dedicated a substantial portion of its core acreage in southwestern Pennsylvania and West Virginia to the Company and has entered into long-term firm gathering and transmission contracts and contracts with MVCs on certain of the Company's systems, EQT may determine in the future that drilling or continuing to produce gas from existing wells in the Company's areas of operations is not economical above the amount to fulfill its required MVCs or otherwise strategically determine to curtail volumes on the Company's systems. Other than with respect to its MVCs and other firm commitments under existing contracts, EQT is under no contractual obligation to continue to develop its acreage dedicated to the Company. See also "Outlook" in Part I, "Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations" of this Quarterly Report on Form 10-Q for a discussion of the EQT Global GGA and the 2021 Water Services Agreement.

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The fair value of the Company’s derivative instruments is, in part, determined by estimates of the NYMEX Henry Hub natural gas forward price curve. A hypothetical 10% increase in NYMEX Henry Hub natural gas futures prices would increase the valuation of the Company’s derivative instruments by approximately $4.2 million, while a hypothetical 10% decrease in NYMEX Henry Hub natural gas futures prices would decrease the valuation of the Company’s derivative instruments by approximately $4.8 million. This fair value change assumes volatility based on prevailing market parameters at September 30, 2023. See Note 7 and "Outlook" in Part I, "Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations" of this Quarterly Report on Form 10-Q for a discussion of the Henry Hub cash bonus payment provision.

Credit Risk. The Company is exposed to credit risk, which is the risk that it may incur a loss if a counterparty fails to perform under a contract. The Company actively manages its exposure to credit risk associated with customers through credit analysis, credit approval and monitoring procedures. For certain transactions, the Company requests letters of credit, cash collateral, prepayments or guarantees as forms of credit support. Equitrans, L.P.'s FERC tariffs require tariff customers that do not meet specified credit standards to provide three months of credit support; however, the Company is exposed to credit risk beyond this three-month period when its tariffs do not require its customers to provide additional credit support. For some of the Company's long-term contracts associated with system expansions, it has entered into negotiated credit agreements that provide for other credit support if certain credit standards are not met. The Company has historically experienced only minimal credit losses in connection with its receivables.

The Company is exposed to the credit risk of its customers, including its largest customer, EQT, including as a result of changes in customer credit ratings, liquidity and access to capital markets. In August 2023, Moody's upgraded EQT's public senior debt to an investment grade credit rating and as of September 30, 2023, EQT's public debt has investment grade credit ratings from S&P, Fitch and Moody's. See "Credit Letter Agreement" included in Part I, "Item 1. Business" of the Company's Annual Report on Form 10-K for the year ended December 31, 2022, for information regarding the Credit Letter Agreement and associated EQT credit rating requirements. In addition, EQT has guaranteed the payment obligations of certain of its subsidiaries, up to a maximum amount of $115 million, $131 million and $30 million related to gathering, transmission and water services, respectively, across all applicable contracts, for the benefit of the subsidiaries of the Company providing such services. See Note 14 to the consolidated financial statements in the in the Company's Annual Report on Form 10-K for the year ended December 31, 2022, for further discussion of the Company's exposure to certain credit risks.

Item 4. Controls and Procedures

Evaluation of Disclosure Controls and Procedures. Under the supervision and with the participation of management, including the Company’s Principal Executive Officer and Principal Financial Officer, an evaluation of the Company’s disclosure controls and procedures (as defined in Rule 13a-15(e) under the Exchange Act) was conducted as of the end of the period covered by this report. Based on that evaluation, the Principal Executive Officer and Principal Financial Officer concluded that the Company’s disclosure controls and procedures were effective as of the end of the period covered by this report.

Changes in Internal Control over Financial Reporting. There were no changes in the Company's internal control over financial reporting (as such term is defined in Rule 13a-15(f) under the Exchange Act) that occurred during the third quarter of 2023 that have materially affected, or are reasonably likely to materially affect, the Company's internal control over financial reporting.

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PART II.  OTHER INFORMATION

Item 1. Legal Proceedings

From time to time, various legal and regulatory claims and proceedings are pending or threatened against the Company and its subsidiaries. While the amounts claimed may be substantial, the Company is unable to predict with certainty the ultimate outcome of such claims and proceedings. The Company accrues legal and other direct costs related to loss contingencies when incurred. The Company establishes reserves whenever it believes it to be appropriate for pending matters. Furthermore, after consultation with counsel and considering the availability, if any, of insurance, the Company believes, although no assurance can be given, that the ultimate outcome of any matter currently pending against it or any of its consolidated subsidiaries will not materially adversely affect its business, financial condition, results of operations, liquidity or ability to pay dividends to its shareholders.

Environmental Proceedings

Pratt Storage Field. On October 31, 2018, a gas explosion occurred in Morgan Township, Greene County, Pennsylvania (the Incident). Following the explosion, the Pennsylvania Department of Environmental Protection (the PADEP), the Pennsylvania Public Utilities Commission and the PHMSA began investigating the Incident. In January 2020, the PADEP notified the Company that it was required to submit an investigation report pursuant to the state’s gas migration regulations due to the Incident's proximity to the Company's Pratt Storage Field assets. The Company, while disputing the applicability of the regulations, submitted a report to the PADEP in March 2020. In September 2020, the PADEP responded to the Company’s investigation report with a request for additional information. The Company responded to the September 2020 request. Over the next months the Company provided many responses to the PADEP’s continuing information requests. The PADEP issued a final report and closed its investigation and the Company does not expect further inquiry from the PADEP on this matter. On October 23, 2023, the Company received permission from the FERC to plug and abandon the well in the Pratt Storage Field that is the subject of the PADEP’s investigation of the Company. Additionally, the Company is continuing to defend in a civil litigation related to the Incident.

On October 30, 2023, the Company received a criminal complaint from the State Attorney General’s Office charging the Company with violations of the Clean Streams Law (the Pratt Complaint). In response to the Pratt Complaint, the Company intends to fully assert its rights and defenses to the claims raised. The Pratt Complaint carries the possibility of a monetary sanction, that if imposed could result in a fine in excess of $300,000. The Pratt Complaint could also cause reputational or other adverse impacts.

Rager Mountain Storage Field. On November 6, 2022, the Company became aware of natural gas venting from one of the storage wells, well 2244, at Equitrans, L.P.’s Rager Mountain natural gas storage facility (Rager Mountain facility), located in Jackson Township, a remote section of Cambria County, Pennsylvania. The venting of natural gas from well 2244 was halted on November 19, 2022. The PADEP, the PHMSA and other investigators are continuing to conduct civil and criminal investigations of the incident and the Company is cooperating in such investigations. On December 7, 2022, the Company and its subsidiary Equitrans, L.P. each separately received an order from the PADEP alleging, in connection with earth disturbance activities undertaken to halt the venting of natural gas from well 2244, (i) in the case of the order received by the Company, violations of Pennsylvania’s Clean Streams Law and requiring certain remedial actions and (ii) in the case of the order received by Equitrans, L.P., violations of Pennsylvania’s 2012 Oil and Gas Act, Clean Streams Law and Solid Waste Management Act and requiring certain remedial actions. On December 8, 2022, the PADEP submitted a compliance order to Equitrans, L.P. relating to certain alleged violations of law in respect of wells at the Rager Mountain natural gas storage field and the venting of natural gas, including from well 2244. The December 8, 2022 order also prohibited Equitrans, L.P. from injecting natural gas into the storage wells at the Rager Mountain facility. The Company and Equitrans, L.P. disputed aspects of the applicable orders, and on January 5, 2023, the Company and Equitrans, L.P., as applicable, appealed each of the orders to the Commonwealth of Pennsylvania Environmental Hearing Board. Additionally, the Company and Equitrans, L.P., as applicable, have received, and may continue to receive, notices of violation (NOVs) related to the incident which allege violations of various Pennsylvania statutes and regulations. Equitrans, L.P. and the PADEP entered into a Stipulation of Settlement on April 12, 2023 that, among other things, resulted in the PADEP rescinding its December 8, 2022 order and Equitrans, L.P. withdrawing its appeal of such order. Equitrans, L.P.’s and the Company's appeals of the December 7, 2022 orders remain pending and negotiations regarding a potential consent order with respect to such NOVs remain ongoing. On December 29, 2022, the PHMSA issued the Company a Notice of Proposed Safety Order that included proposed remedial requirements related to the Rager Mountain natural gas storage field incident, including, but not limited to, completing a root cause analysis. The Company addressed certain proposals in advance of an order from the agency. These efforts included conducting testing, evaluating other wells at the Rager field and hiring a third-party specialist firm to undertake a root cause analysis, and subsequently on May 26, 2023, the PHMSA issued a consent order to the Company incorporating the terms of a consent agreement between the parties, which, among other things, required the completion of a root cause analysis and a remedial

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work plan, and specified that the Company may not resume injection operations at the Rager Mountain facility until authorized by the PHMSA. As discussed in “Transmission Results of Operation” in Part I, "Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations" of this Quarterly Report on Form 10-Q, in August 2023, the Company submitted a root cause analysis to the PHMSA in accordance with the consent order and later submitted a remedial work plan and, following completion of all actions in its remedial work plan, an injection plan to the PHMSA seeking authority to resume injections at Rager Mountain using all wells except three, which remain disconnected. On October 2, 2023, the PHMSA approved the Company’s injection plan. The Company began injections at Rager Mountain on October 5, 2023. On October 5, 2023, Equitrans, L.P. received a NOV from the PADEP related to the release of uncontrolled hydrocarbons to the atmosphere during the Rager Mountain natural gas storage field incident.

If penalties are pursued and ultimately imposed related to the Rager Mountain natural gas storage field incident, the penalties are expected to result in monetary sanctions in excess of $300,000. While the Company does not believe that penalties, if imposed, would have a material adverse impact on the Company's financial condition, results of operations or liquidity, there can be no assurance as of the filing of this Quarterly Report on Form 10-Q regarding the scope of potential (or ultimately actual) financial or other impacts to the Company as a result of the Rager Mountain natural gas storage field incident.

MVP Matters

There remain certain legal and regulatory matters relevant to the MVP project, the outcome of which could have adverse effects with respect to the project and consequently the Company, including certain matters pending with the U.S. Court of Appeals for the District of Columbia (D.C. Circuit) and the PHMSA described below:

•Jefferson National Forest (JNF) Crossing and Associated Authorizations. In Sierra Club, et al. v. U.S. Forest Service, et al., consolidated under Case No. 17-2399, Fourth Circuit, filed in December 2017, the Sierra Club challenged a U.S. Department of Interior, Bureau of Land Management (BLM) decision to grant a right-of-way to the MVP Joint Venture and a U.S. Forest Service (USFS) decision to amend its management plan to accommodate the MVP, both of which affected the MVP's approximate 3.5-mile segment in the JNF in Virginia. On July 27, 2018, agreeing in part with the Sierra Club, the Fourth Circuit vacated the BLM and USFS decisions. On January 11, 2021, the MVP Joint Venture received final approval of the Record of Decision from the USFS and, on January 15, 2021, the BLM issued a new required right-of-way permit for the MVP’s 3.5-mile segment in the JNF in Virginia (2021 JNF Right-of-Way). On January 11, 2021, Sierra Club, et al. filed a petition with the Fourth Circuit to reverse the USFS approval of the Record of Decision and, on January 15, 2021, filed a petition with the Fourth Circuit challenging BLM’s grant of the 2021 JNF Right-of-Way. See Wild Virginia, et al. v. United States Forest Service, et al., No. 21-1039(L). On January 25, 2022, the Fourth Circuit, agreeing in part with the petitioners, vacated and remanded the Record of Decision and the 2021 JNF Right-of-Way. In May 2023, the MVP Joint Venture received a new Record of Decision from the USFS and was issued a new right-of-way permit by the BLM (2023 JNF Right-of-Way). On June 2, 2023, The Wilderness Society filed a petition with the Fourth Circuit to reverse the USFS’ approval of the new Record of Decision (No. 23-1592) and the BLM’s grant of the 2023 JNF Right-of-Way (No. 23-1594). See The Wilderness Society v. U.S. Forest Service, et al., consolidated under Case No. 23-1592, Fourth Circuit. Given provisions in the Fiscal Responsibility Act of 2023 discussed in “Mountain Valley Pipeline” in "Outlook" in Part I, "Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations" of this Quarterly Report on Form 10-Q divesting courts of jurisdiction to review agency actions on approvals necessary for MVP’s construction and initial operation, the MVP Joint Venture and the U.S. Department of Justice filed motions to dismiss the proceeding on June 5, 2023 and June 15, 2023, respectively. The Wilderness Society subsequently moved for a stay of the authorizations pending review and a temporary administrative stay of the authorizations on July 3, 2023 and July 6, 2023, respectively. On July 10, 2023, the Fourth Circuit granted the stay pending review in a summary order. The MVP Joint Venture subsequently filed on July 14, 2023, an emergency application to vacate the stay with the U.S. Supreme Court which was granted on July 27, 2023. On August 11, 2023, the MVP Joint Venture’s and the U.S. Department of Justice’s motions to dismiss were granted by the Fourth Circuit. No party sought rehearing. The Fourth Circuit subsequently issued its mandate closing the proceeding.

On August 3, 2018, citing the court’s vacatur and remand in Sierra Club, et al. v. U.S. Forest Service, et al., consolidated under Case No. 17-2399, the FERC issued a stop work order for the entire pipeline pending the agency actions on remand. The FERC modified its stop work order on August 29, 2018 to allow work to continue on all but approximately 25 miles of the project (the Exclusion Zone) and made certain other limited modifications of the stop work order. On October 9, 2020, the FERC authorized construction to resume project-wide (as it had been stopped by the FERC on October 15, 2019 in relation to a separate matter), other than with respect to the Exclusion Zone, which required additional authorization. On December 17, 2020, the FERC again modified the stop work order and authorized construction to resume in 17 miles of the Exclusion Zone. The FERC’s October 9, 2020 and December 17, 2020 actions are the subject of challenges filed by the Sierra Club in Sierra Club, et al. v. FERC, Case No. 20-1512

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(consolidated with No. 21-1040), D.C. Circuit Court of Appeals on December 22, 2020 and January 25, 2021, respectively. Briefing in Sierra Club, et al. v. FERC, Case No. 20-1512 (consolidated with No. 21-1040), D.C. Circuit Court of Appeals resulted in the D.C. Circuit issuing a decision on May 26, 2023, rejecting all of the petitioners’ challenges except one and remanding without vacatur the October and December 2020 FERC orders on the basis of the FERC inadequately having explained whether a supplemental environmental impact statement under National Environmental Policy Act (NEPA) was necessary before allowing construction to resume pursuant to the orders. On June 28, 2023, the FERC authorized the MVP Joint Venture to resume all construction activities in all MVP project locations, including the remaining portion of the Exclusion Zone. No party sought rehearing of the FERC’s June 28, 2023 authorization. Given provisions in the Fiscal Responsibility Act of 2023 discussed in "Mountain Valley Pipeline" in "Outlook" in Part I, "Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations" of this Quarterly Report on Form 10-Q, on July 31, 2023, the FERC filed a motion to dismiss Case No. 20-1512 (consolidated with No. 21-1040), and on August 25, 2023, the D.C. Circuit granted the motion to dismiss and further ordered that the petitions for review be dismissed as moot and the decision of May 26, 2023, be vacated. No party sought rehearing. The D.C. Circuit subsequently issued its mandate closing the proceeding.

Challenges to FERC Certificate, D.C. Circuit. Multiple parties have sought judicial review of the FERC’s order issuing a certificate of public convenience and necessity to the MVP Joint Venture and/or the exercise by the MVP Joint Venture of eminent domain authority. On February 19, 2019, the D.C. Circuit issued an order rejecting multiple consolidated petitions seeking direct review of the FERC order under the Natural Gas Act of 1938, as amended (NGA) and certain challenges to the exercise by the MVP Joint Venture of eminent domain authority in Appalachian Voices, et al. v. FERC, et al., consolidated under Case No. 17-1271. No petitions for rehearing or petitions for rehearing en banc were filed by the April 5, 2019 deadline. The mandate was issued on April 17, 2019. Another group of parties filed a complaint in the U.S. District Court for the District of Columbia asserting that the FERC’s order issuing certificates is unlawful on constitutional and other grounds in Bold Alliance, et al. v. FERC, et al., Case No. 17-1822. The district court plaintiffs sought declaratory relief as well as an injunction preventing the MVP Joint Venture from developing its project or exercising eminent domain authority. In December 2017 and January 2018, the FERC and the MVP Joint Venture, respectively, moved to dismiss the petitions for lack of subject matter jurisdiction. The court granted the motion and dismissed plaintiffs’ complaint on September 28, 2018. On October 26, 2018, plaintiffs appealed the decision in Case No. 17-1822 to the D.C. Circuit in Bold Alliance, et al. v. FERC, et al., Case No. 18-5322. On December 3, 2018, the FERC, as appellee, filed a joint motion with the appellants to hold Case No. 18-5322 in abeyance pending completion of the appeals of the final agency orders related to the MVP certificate in consolidated Case No. 17-1271 and Atlantic Coast Pipeline’s (ACP) certificate. The MVP Joint Venture filed a motion to dismiss the case as to some of the plaintiffs. On February 15, 2019, the D.C. Circuit entered an order holding this appeal in abeyance pending rulings on the appeals from the ACP and MVP FERC proceedings. The ACP petitioners on November 16, 2022, filed a joint motion for voluntary dismissal of all petitions for review pertaining to ACP, except for the Bold Alliance proceeding. The court granted the motion on November 17, 2022. On January 5, 2023, the D.C. Circuit entered an order holding the Bold Alliance proceeding in abeyance pending further order of the court and requiring the parties to file motions to govern future proceedings within 60 days of the U.S. Supreme Court disposition of the petition for writ of certiorari in Bohon et al. v. FERC et al., discussed below. On June 26, 2023, the court entered an order continuing the abeyance of Bold Alliance until 30 days after the disposition of Case No. 20-5203, discussed below.

Similarly, another group of parties filed a complaint in the U.S. District Court for the District of Columbia in Bohon et al. v. FERC et al., Case No. 20-00006, asserting that the delegation of authority to the FERC under the NGA violates the nondelegation doctrine and separation-of-powers principle of the U.S. Constitution. The MVP Joint Venture and the FERC filed motions to dismiss which were granted by the court. On July 6, 2020, the landowners filed a notice of appeal to the D.C. Circuit in Case No. 20-5203. On November 30, 2020, appellants asked the D.C. Circuit to overturn the decision of the lower court. The D.C. Circuit issued an order on September 15, 2021 denying appellants’ motion for summary reversal of the decision of the lower court and supplemental briefing was completed as of October 6, 2021. On June 21, 2022, the D.C. Circuit upheld the lower court’s decision to dismiss the lawsuit. On September 15, 2022, the petitioners filed a petition for writ of certiorari with the U.S. Supreme Court. The FERC and the MVP Joint Venture filed responses to the petition in November 2022. On April 24, 2023, the U.S. Supreme Court granted the petition for certiorari, vacated the judgment, and remanded the case to the D.C. Circuit for further consideration in light of the U.S. Supreme Court's April 14, 2023 opinion in Axon Enterprises, Inc. v. FTC. The D.C. Circuit subsequently issued an order authorizing, among other things, the parties to address in their supplemental briefing the implications of Section 324 of the Fiscal Responsibility Act of 2023 in addition to Axon. Supplemental briefing in the Bohon matter is scheduled to conclude on November 13, 2023. On October 24, 2023, the D.C. Circuit denied a stay motion filed by the petitioners. If any of these challenges were successful, it could result in the MVP Joint Venture’s certificate of public convenience and necessity being vacated and/or additional proceedings before the FERC, the

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outcome of which the Company cannot ensure, and cause a delay or further delay in the full in-service date for the MVP project (and consequent impacts related to such delay), or otherwise have adverse effects.

Due to the uncertainty regarding the timing of permitting and the outcome of legal challenges facing the MVP project, on August 25, 2020, the MVP Joint Venture filed a request with the FERC for and, on October 9, 2020, the FERC granted, an extension of time to complete the MVP project for an additional two years through October 13, 2022. On December 22, 2020, a challenge to the FERC’s action to grant an extension of time to complete the MVP project was filed in the D.C. Circuit in Sierra Club, et al. v. FERC, Case No. 20-1512 (consolidated with No. 21-1040, D.C. Circuit). Briefing in Sierra Club, et al. v. FERC, Case No. 20-1512 (consolidated with No. 21-1040, D.C. Circuit), was completed in January 2022 and oral argument occurred on April 7, 2022. On May 26, 2023, the D.C. Circuit held that the petitioners’ challenge to the October 9, 2020 extension order was moot. Separately, on June 24, 2022, citing litigation and regulatory matters, the MVP Joint Venture filed a request with the FERC for an extension of time to complete the MVP project through October 13, 2026, which was granted on August 23, 2022. Parties filed timely requests for rehearing with the FERC regarding such approval, which were denied by the FERC on October 24, 2022 and February 17, 2023. Parties also filed petitions for review of such approval with the D.C. Circuit (Case Nos. 22-1330 and 23-1117, which were consolidated). On June 21, 2023, the MVP Joint Venture filed a motion to dismiss for lack of jurisdiction or, in the alternative, for summary denials of the consolidated petitions. Petitioners on June 22, 2023 moved for voluntary dismissal of the consolidated petitions, which the MVP Joint Venture opposed. On September 7, 2023, the D.C. Circuit issued an order granting the petitioners’ motion for voluntary dismissal with prejudice and dismissing as moot the MVP Joint Venture’s cross-motions based on Section 324 of the Fiscal Responsibility Act of 2023. That same day, the D.C. Circuit issued its mandate closing the proceeding.

•Appalachian Voices, et al. v. U.S. Dep’t of Interior, et al., Fourth Circuit Court of Appeals, Case No. 20-2159. In August 2019, Wild Virginia and certain other petitioners filed a petition in the Fourth Circuit in Wild Virginia et al. v. United States Department of the Interior; Case No. 19-1866, to challenge the MVP Joint Venture’s Biological Opinion and Incidental Take Statement issued by FWS which was approved in November 2017 (the Original BiOp). On October 11, 2019, the Fourth Circuit issued an order approving the petitioners’ requested stay of the Original BiOp and holding the litigation in abeyance until January 11, 2020. On October 15, 2019, the FERC issued an order requiring the MVP Joint Venture to cease all forward-construction progress (the FERC modified this order on October 9, 2020 and December 17, 2020 and on June 28, 2023, the FERC issued an order authorizing all construction activities). On September 4, 2020, the FWS issued the MVP Joint Venture a new Biological Opinion and Incidental Take Statement (the 2020 BiOp) for the MVP project and the Fourth Circuit subsequently dismissed the litigation regarding the Original BiOp. On October 27, 2020, Appalachian Voices et al. filed a petition with the Fourth Circuit challenging the 2020 BiOp. On February 2, 2022, the Fourth Circuit vacated and remanded the 2020 BiOp. On February 28, 2023, the FWS issued a new Biological Opinion and Incidental Take Statement for the MVP project (the 2023 BiOp). The petitioners appealed the 2023 BiOp to the Fourth Circuit on April 10, 2023. See Appalachian Voices, et al. v. U.S. Dep’t of Interior, et al., Fourth Circuit Court of Appeals Case No. 23-1384. On April 24, 2023, the petitioners filed an administrative stay with the FWS, which stay request was denied on April 27, 2023. The petitioners filed a motion to stay the 2023 BiOp in the Fourth Circuit on April 27, 2023. On June 5, 2023, given provisions in the Fiscal Responsibility Act of 2023 discussed in “Mountain Valley Pipeline” in "Outlook" in Part I, "Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations" of this Quarterly Report on Form 10-Q divesting courts of jurisdiction to review agency actions on approvals necessary for MVP’s construction and initial operation, the MVP Joint Venture and the U.S. Department of Justice filed motions to dismiss the proceeding on June 5, 2023 and June 15, 2023, respectively. On July 11, 2023, in a summary order, the Fourth Circuit granted the petitioners’ request for stay of the 2023 BiOp pending review. The MVP Joint Venture subsequently filed on July 14, 2023, an emergency application to vacate the stay with the U.S. Supreme Court which was granted on July 27, 2023. On August 11, 2023, the MVP Joint Venture’s and the U.S. Department of Justice’s motions to dismiss were granted by the Fourth Circuit. No party sought rehearing. The Fourth Court subsequently issued its mandate closing the proceeding.

•Mountain Valley Pipeline PHMSA Consent Order. On October 3, 2023, the PHMSA issued a consent order incorporating the terms of a consent agreement entered into by the PHMSA and the Company as the operator of the MVP project. The consent agreement resolves the Notice of Proposed Safety Order (NOPSO) that the PHMSA issued to the Company on August 11, 2023, for the MVP project, without admission or denial of any of the allegations in the NOPSO. The consent agreement outlines the steps being taken by the MVP Joint Venture to responsibly complete construction, including, among other things, enhancing MVP’s existing coating, remediation and inspection processes, mandating or accelerating certain previously planned MVP inline inspections, accelerating the regulatory timeline for conducting cathodic protection surveys, and implementing additional measures to assess cathodic protection following

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MVP full in-service. Failure to comply with the terms of the consent agreement could have adverse effects on the project, including affecting project timing (and consequent impacts related to any delay).

Item 1A. Risk Factors

The Company is subject to a variety of significant risks in addition to the matters set forth under the forward-looking statements section in Part I, Item 2, "Management's Discussion and Analysis of Financial Condition and Results of Operations," of this Quarterly Report on Form 10-Q. The Company has identified a number of these risk factors in Part I, Item 1A, "Risk Factors," in its Annual Report on Form 10-K for the year ended December 31, 2022, which risk factors, as modified by this Quarterly Report on Form 10-Q, are incorporated herein by reference. These risk factors should be considered carefully in evaluating the Company’s risk profile.

There have been no material changes from the risk factors previously disclosed in the Company's Annual Report on Form 10-K for the year ended December 31, 2022.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

Purchases of Equity Securities

The following table sets forth the Company's repurchases of equity securities registered under Section 12 of the Exchange Act that occurred during the three months ended September 30, 2023:

Period	Total number of shares purchased (a)	Average price paid per share		Total number of shares purchased as part of publicly announced plans or programs	Approximate dollar value of shares that may yet be purchased under the plans or programs
July 2023 (July 1 - July 31)	—	$	—	—	$	—
August 2023 (August 1 - August 31)	—	—		—	—
September 2023 (September 1 - September 30)	—	—		—	—
Total	—	$	—	—	$	—

(a)Reflects shares withheld by the Company to pay taxes upon vesting of restricted stock.

Item 5. Other Information

During the three months ended September 30, 2023, no director or officer of the Company subject to Section 16 of the Exchange Act adopted, terminated or modified a ‘Rule 10b5-1 trading arrangement’ or ‘non-Rule 10b5-1 trading arrangement,’ as each term is defined in Item 408(a) of Regulation S-K.

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Item 6. Exhibits

Exhibit No.	Document Description	Method of Filing
10.1*	Form of Equitrans Midstream Corporation Senior Executive 2021 MVP Performance Share Units Award Agreement Notice.	Incorporated herein by reference to Exhibit 10.02 to Form 10-Q (#001-38629) filed on August 1, 2023.
10.02*	Transition Agreement between Equitrans Midstream Corporation and Thomas F. Karam.	Incorporated herein by reference to Exhibit 10.1 to Form 8-K (#001-38629) filed on September 7, 2023.
10.3*	Second Amendment to Amended and Restated Confidentiality, Non-Solicitation and Non-Competition Agreement, dated as of January 15, 2019, by and between Equitrans Midstream Corporation and Diana M. Charletta.	Incorporated herein by reference to Exhibit 10.2 to Form 8-K (#001-38629) filed on September 7, 2023.
10.4*	Second Amendment to Amended and Restated Confidentiality, Non-Solicitation and Non-Competition Agreement, dated as of November 13, 2018, by and between Equitrans Midstream Corporation and Thomas F. Karam.	Incorporated herein by reference to Exhibit 10.3 to Form 8-K (#001-38629) filed on September 7, 2023.
10.5*	Second Amendment to Amended and Restated Confidentiality, Non-Solicitation and Non-Competition Agreement, dated as of November 13, 2018, by and between Equitrans Midstream Corporation and Kirk R. Oliver.	Incorporated herein by reference to Exhibit 10.4 to Form 8-K (#001-38629) filed on September 7, 2023.
10.6*	Second Amendment to Confidentiality, Non-Solicitation and Non-Competition Agreement, dated as of April 15, 2019, by and between Equitrans Midstream Corporation and Stephen M. Moore.	Incorporated herein by reference to Exhibit 10.5 to Form 8-K (#001-38629) filed on September 7, 2023.
10.7*	First Amendment to Confidentiality, Non-Solicitation and Non-Competition Agreement, dated as of February 20, 2023, by and between Equitrans Midstream Corporation and Brian P. Pietrandrea.	Incorporated herein by reference to Exhibit 10.6 to Form 8-K (#001-38629) filed on September 7, 2023.
10.8*	Fourth Amendment to Third Amended and Restated Credit Agreement, dated as of October 6, 2023, by and among EQM Midstream Partners, LP, the lender parties thereto and Wells Fargo Bank, National Association, as administrative agent.	Incorporated herein by reference to Exhibit 10.1 to Form 8-K (#001-38629) filed on October 10, 2023.
10.9#	Letter Agreement, dated as of October 3, 2023, by and among EQM Gathering Opco, LLC, EQT Corporation, EQT Production Company, Rice Drilling B LLC, and EQT Energy, LLC.	Filed herewith as Exhibit 10.9.
10.10#	Fifth Amendment to Gas Gathering and Compression Agreement, dated as of October 4, 2023, by and among EQT Corporation, EQT Production Company, Rice Drilling B LLC, EQT Energy, LLC and EQM Gathering Opco, LLC.	Filed herewith as Exhibit 10.10.
10.11#	Letter Agreement, dated as of October 5, 2023, by and among EQM Gathering Opco, LLC, Equitrans, L.P., EQT Corporation, EQT Production Company, Rice Drilling B LLC, and EQT Energy, LLC.	Filed herewith as Exhibit 10.11.
10.12#	Amended and Restated Letter Agreement, dated as of October 12, 2023, by and among EQM Gathering Opco, LLC, EQT Corporation, EQT Production Company, Rice Drilling B LLC, and EQT Energy, LLC	Filed herewith as Exhibit 10.12.
31.1	Rule 13(a)-14(a) Certification of Principal Executive Officer.	Filed herewith as Exhibit 31.1.
31.2	Rule 13(a)-14(a) Certification of Principal Financial Officer.	Filed herewith as Exhibit 31.2.
32	Section 1350 Certification of Principal Executive Officer and Principal Financial Officer.	Furnished herewith as Exhibit 32.
101	Inline Interactive Data File.	Filed herewith as Exhibit 101.
104	Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101).	Filed herewith as Exhibit 104.

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# Certain portions of the exhibits that are not material and is of the type Equitrans Midstream treats as confidential have been redacted pursuant to Item 601(b)(10)(iv) of Regulation S-K. Copies of the unredacted exhibits will be furnished to the SEC upon request.

*Management contract and compensatory arrangement in which any named executives officer participates.

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Signature

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Equitrans Midstream Corporation
(Registrant)
By:	/s/ Kirk R. Oliver
	Kirk R. Oliver
	Senior Vice President and Chief Financial Officer

Date:  October 31, 2023

47

EX-10.9

Exhibit 10.9

SPECIFIC TERMS IN THIS LETTER AGREEMENT HAVE BEEN REDACTED BECAUSE SUCH TERMS ARE BOTH NOT MATERIAL AND ARE OF A TYPE THAT EQUITRANS MIDSTREAM CORPORATION TREATS AS CONFIDENTIAL. THESE REDACTED TERMS HAVE BEEN MARKED IN THIS EXHIBIT AT THE APPROPRIATE PLACE WITH THREE ASTERISKS [***].

October 3, 2023

Rice Drilling B LLC

625 Liberty Avenue, Suite 1700

Pittsburgh, Pa 15222-3111

Attn: J.E.B. Bolen

RE:    Letter Agreement – [***]

Dear Mr. Bolen:

Reference is made to that certain Gas Gathering and Compression Agreement dated as of February 26, 2020 by and among EQT Corporation, EQT Production Company, Rice Drilling B LLC and EQT Energy, LLC (collectively, “Producer”), and EQM Gathering Opco, LLC (“Gatherer”), as the same was amended by that certain First Amendment to Gas Gathering and Compression Agreement dated August 26, 2020, that Second Amendment to Gas Gathering and Compression Agreement dated December 6, 2021 and that Third Amendment to Gas Gathering Compression Agreement dated December 21, 2021 and that Fourth Amendment to Gas Gathering Compression Agreement dated January 23, 2023 between Producer and Gatherer (as amended, the “Gathering Agreement”). All capitalized terms used but not otherwise defined in this letter agreement (“Letter Agreement”) shall have the meanings (if any) ascribed to them in the Gathering Agreement.

WHEREAS, the Producer’s Well Pad known as the [***] Well Pad, which is or will be connected to a Receipt Point located on the [***] System AMI and depicted on Exhibit A attached hereto (“[***] Well Pad”), has an Anticipated Production Date of [***] based on the applicable Additional Confirmation Notice;

WHEREAS, Producer has requested that Gatherer commence receiving Dedicated Gas into the Gathering System at the [***] Well Pad (“[***] Receipt Point”) as of [***] or such earlier date as the Parties mutually agree in writing (including email) (“Requested Service Date”); and

WHEREAS, Gatherer is willing to commence receiving Dedicated Gas at the [***] Receipt Point from and after the Requested Service Date, subject to the terms and conditions hereof.

NOW, THEREFORE, Gatherer and Producer (collectively, “Parties” and each a “Party”), by execution of this Letter Agreement and in consideration of the mutual covenants contained herein, do hereby agree as follows:

1. Service Commencement; [***] Shut-In Period. Subject to the terms and conditions of this Letter Agreement:

(a)Gatherer agrees to begin accepting Dedicated Gas into the Gathering System at the [***] Receipt Point on the Requested Service Date, and Producer’s and Gatherer’s rights, remedies and obligations with respect to the delivery and receipt of Dedicated Gas shall apply to Dedicated Gas delivered at the [***] Receipt Point following the Requested Service Date;

(b)Producer agrees to shut-in production of Dedicated Gas from its Well Pads known as the [***] (each a “[***] Receipt Point” and collectively, the “[***] Receipt Points”) during the period commencing on or before the Requested Service Date and continuing until the earlier of (i) Gatherer’s completion of the installation work described in clause (c) below and (ii) [***] (the “[***] Shut-In Period”). For the avoidance of doubt, Producer acknowledges and agrees that the shut-in of the [***] Receipt Points during the [***] Shut-In Period is intended to prevent [***] in the Gathering System and does not represent a failure by Gatherer to receive Dedicated Gas at the [***] Receipt Points which could result in a Temporary Release as contemplated in Section 3.8 of the Gathering Agreement;

(c)Gatherer agrees to complete the installation of (i) pad-level dehydration facilities upstream of each [***] Receipt Point and (ii) a heater at the [***] Well Pad, which facilities and installation shall be completed, in each case, to applicable industry standards and not later than [***];

(d)Producer agrees that Dedicated Gas delivered to the [***] Receipt Point during the [***] Shut-In Period shall maintain a minimum temperature of [***];

(e)Notwithstanding anything herein to the contrary, this Letter Agreement shall not amend or otherwise modify the obligations of the Parties with respect to the connection of any future Receipt Points to the Gathering System under the Gathering Agreement and the other terms and conditions thereof.

2.    Miscellaneous. The terms and provisions of this Letter Agreement shall be binding on, and shall inure to the benefit of, the Parties and their respective successors and permitted assigns. This Letter Agreement may be executed in any number of counterparts, and each such counterpart hereof shall be deemed to be an original instrument, but all of such counterparts shall constitute for all purposes one agreement. Any signature hereto delivered by a Party by facsimile or other electronic transmission (including scanned documents delivered by email) shall be deemed an original signature hereto, and execution and delivery by such means shall be binding upon the Parties.

3.    Effect of Letter Agreement. The Parties acknowledge and agree that this Letter Agreement constitutes a written instrument executed by the Parties and fulfills the requirements of an amendment contemplated by Section 18.7 of the Gathering Agreement. The Parties hereby ratify and confirm the Gathering Agreement, as amended hereby. Except as expressly provided herein, the provisions of the Gathering Agreement shall remain in full force and effect in accordance with their respective terms following the execution of this Letter Agreement. In the event of any conflict or inconsistencies between this Letter Agreement and the Gathering Agreement, the terms and conditions of this Letter Agreement shall prevail.

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4.    Governing Law; Jury Waiver. This Letter Agreement shall be governed by, construed, and enforced in accordance with the laws of the Commonwealth of Pennsylvania without regard to choice of law principles. The Parties agree that the appropriate, exclusive and convenient forum for any disputes among any of the Parties arising out of this Letter Agreement or the transactions contemplated hereby shall be in any state or federal court in the City of Pittsburgh and County of Allegheny, Pennsylvania, and each of the Parties irrevocably submits to the jurisdiction of such courts solely in respect of any proceeding arising out of or related to this Letter Agreement. The Parties further agree that the Parties shall not bring suit with respect to any disputes arising out of this Letter Agreement or the transactions contemplated hereby in any court or jurisdiction other than the above specified courts. EACH PARTY HEREBY WAIVES ITS RIGHT TO TRIAL BY JURY IN ANY PROCEEDING ARISING OUT OF OR RELATING TO THIS LETTER AGREEMENT, WHETHER SOUNDING IN CONTRACT, TORT OR OTHERWISE.

[SIGNATURE PAGE FOLLOWS]

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

GATHERER:

EQM GATHERING OPCO, LLC,

a Delaware limited liability company

By:     /s/ John M. Quinn        

Name: John M. Quinn            

Title:     _VP Business Development & Commercial Services

PRODUCER:

EQT CORPORATION,

a Pennsylvania corporation

By:     /s/ Jeremy Knop        

Name:     Jeremy Knop            

Title:     Chief Financial Officer    

EQT PRODUCTION COMPANY,

a Delaware limited liability company

By:     /s/ J.E.B. Bolen        

Name:     J.E.B. Bolen            

Title:     Vice President Operations Planning

RICE DRILLING B LLC,

a Delaware limited liability company

By:     /s/ J.E.B. Bolen        

Name:     J.E.B. Bolen            

Title:     Vice President Operations Planning

EQT ENERGY, LLC,

a Delaware limited liability company

By:     /s/ Keith Shoemaker        

Name:     Keith Shoemaker        

Title:     SVP Commercial        

EXHIBIT A

[***] System AMI

[***]

EX-10.10

Exhibit 10.10

SPECIFIC TERMS IN THIS LETTER AGREEMENT HAVE BEEN REDACTED BECAUSE SUCH TERMS ARE BOTH NOT MATERIAL AND IS OF TYPE THAT EQUITRANS MIDSTREAM CORPORATION TREATS AS CONFIDENTIAL. THESE REDACTED TERMS HAVE BEEN MARKED IN THIS EXHIBIT AT THE APPROPRIATE PLACE WITH THREE ASTERISKS [***].

FIFTH AMENDMENT TO

GAS GATHERING AND COMPRESSION AGREEMENT

THIS FIFTH AMENDMENT TO GAS GATHERING AGREEMENT AND COMPRESSION AGREEMENT (this “Amendment”), dated October 4, 2023 (“Effective Date”), is made and entered into by and among EQT Corporation, EQT Production Company, Rice Drilling B LLC, and EQT Energy, LLC (collectively, “Producer”), and EQM Gathering Opco, LLC (“Gatherer”) (as amended, the “Gathering Agreement”). Producer and Gatherer may be referred to herein individually as a “Party” or collectively as the “Parties.”

1.RECITALS

WHEREAS, the Parties entered into that certain Gas Gathering and Compression Agreement dated as of February 26, 2020, as amended by that certain First Amendment to Gas Gathering and Compression Agreement among the Parties dated August 26, 2020, that certain Second Amendment to Gas Gathering and Compression Agreement among the Parties dated December 6, 2021, that certain Third Amendment to Gas Gathering and Compression Agreement among the Parties dated December 21, 2021 and that certain Fourth Amendment to Gas Gathering and Compression Agreement among the Parties dated January 23, 2023 (the “Gathering Agreement”); and

WHEREAS, the Parties desire to amend the Gathering Agreement in accordance with the terms and conditions set forth in this Amendment and in connection with that certain Letter Agreement re: Fuel Gas by and among the Parties and Equitrans, L.P., dated as of the date hereof (the “Letter Agreement”).

NOW, THEREFORE, in consideration of the mutual covenants set forth herein and in the Letter Agreement, and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the Parties hereby agree as follows:

2.AGREEMENT

1.Defined Terms. Defined terms used but not defined herein shall have the meanings given to such terms in the Gathering Agreement.

2.New Definitions. The following definitions are added to Article I of the Gathering Agreement:

“Capital Costs” – means, with respect to Transitional Work Costs approved pursuant to the terms hereof and properly invoiced to Produced hereunder, an amount equal to (i) such Transitional Work Costs multiplied by (ii) [***].

“Mining Operations” – means surface or subsurface activity necessary to operate a coal mine and/or extract coal, including development mining, long wall mining, surface mining, coal processing, pre-mining and post-mining removal of methane from coal or surrounding coal strata, drilling exploration holes and gob vent boreholes, and installing or operating portals, shafts, fans, other surface structures, pipelines, power lines, water lines, pumps and compressors and all operations, ground control, subsidence and/or subsidence control measures reasonably related to or arising from the foregoing.

“Mining Operator” – means any Third Party operator, owner or controller that conducts Mining Operations, including without limitation, [***].

“Mining Period” – means the duration of Planned Mining Operations.

“Planned Mining Operations” – means any and all present or future Mining Operations which are planned to be conducted in the vicinity of a portion of the Gathering System by a Mining Operator which would reasonably be expected to require Gatherer to (i) interrupt or curtail Services during the Mining Period and/or (ii) perform Transitional Work and incur expense in order to ensure the continued safe operation of such portion of the Gathering System during the Mining Period, as indicated by Gatherer in a written Work Notice.

“Returned Revenues” – means, with respect to a Planned Mining Operation that would in the absence of the performance of the Transitional Work proposed by Gatherer in the applicable Work Notice require the curtailment of any portion of the Gathering System, the [***]. To the extent the Work Notice includes multiple longwall panels or sections (as reasonably defined by the Mining Operator), Returned Revenues shall be calculated in a manner such that they are not double counted.

“Transitional Work” – As defined in Section 7.5(b).

“Transitional Work Costs” – means the third party out-of-pocket costs that Gatherer incurs in order to perform the Transitional Work impacted by the Planned Mining Operations during the Mining Period. To the extent the Work Notice includes multiple longwall panels or sections (as reasonably defined by the Mining Operator), Transactional Work Costs shall be calculated in a manner such that they are not double counted.

“Work Rejection” – As defined in Section 7.5(b).

“Work Notice” – As defined in Section 7.5(a).

3.Temporary Release. The first parenthetical in the first sentence of Section 3.8 of the Gathering Agreement is hereby deleted in its entirety and replaced with the following:

“(other than those caused or contributed to by (a) the actions or inactions of any member of the Producer Group resulting in Gatherer being unable to accept or deliver Gas or comply with the terms hereof, (b) any event of Force Majeure declared by Producer, (c) Maintenance (except to the extent such Maintenance results in a Maintenance Deficiency), (d) the breach of this

2

Agreement by any member of Producer Group or (e) a Work Rejection in connection with Planned Mining Operations)”

4.Permanent Release. The first parenthetical in the first sentence of Section 3.9(a) of the Gathering Agreement is hereby deleted in its entirety and replaced with the following:

“(other than those caused or contributed to by (i) the actions or inactions of any member of the Producer Group resulting in Gatherer being unable to accept or deliver Gas or comply with the terms hereof, (ii) an event of Force Majeure, (iii) Maintenance, (iv) the breach of this Agreement by any member of Producer Group or (v) a Work Rejection in connection with Planned Mining Operations)”

5.Planned Mining Operations. Section 7.5 is added to the Gathering Agreement to read as follows:

“Section 7.5    Planned Mining Operations. The following process shall apply in the event of Planned Mining Operations:

(a)Gatherer shall provide Producer with written notice (“Work Notice”) of the anticipated commencement of Planned Mining Operations not later than the later of (i) [***] ([***])following the delivery to Gatherer of a notice thereof from a Mining Operator (including any updates to prior notices), and (ii) at least [***] ([***]) prior to the anticipated commencement of a Mining Period. Each Work Notice shall set forth the estimated duration of the Mining Period, the mine section (as reasonably defined by the Mining Operator) in which the Planned Mining Operations are located, and the portions of the Gathering System affected thereby and describe (i) the work, including without limitation exposing, bracing, shutting in and/or relocating such portion of the Gathering System, as applicable, that would be required for Gatherer to ensure the continued operation of the affected portion of the Gathering System during the Mining Period (“Transitional Work”), (ii) the Transitional Work Costs associated therewith, and (iii) the Returned Revenues associated therewith. A Work Notice with respect to the Planned Mining Operations of [***] described on Schedule A to this Amendment shall be deemed to have been timely delivered, and Producer shall have elected to approve the Transitional Work proposed by Gatherer therein.

(b)If Gatherer delivers the Work Notice in accordance with Section 7.5(a), Producer may, within [***] of receiving such Work Notice, by written notice to Gatherer, elect to approve or reject the Transitional Work proposed by Gatherer therein. In the event that Producer elects to reject the proposal set forth in such Work Notice (or does not approve the proposal within such [***] period) (a “Work Rejection”), then Gatherer shall (i) have no obligation to perform the Transitional Work, and (ii) shall be permitted to interrupt or curtail Service during the Mining Period with respect to the portions of the Gathering System described as affected in the Work Notice to the extent such interruption or curtailment is a result of the Mining Operations, free and clear of any claim of a reduction in the Minimum Volume Commitment, permanent release or other remedy hereunder; provided, however, that Producer may elect to treat the Dedicated Gas subject to such curtailment as Temporarily Released for the duration of the applicable Mining Period.

(c)If Producer approves the Transitional Work, Gatherer will complete the Transitional Work prior to the commencement of the Mining Period at Gatherer’s sole cost and expense, subject to the terms of this Section 7.5(d). Following the expiration of the applicable Mining Period and Gatherer’s determination of the actual Transitional Work Costs, Gatherer

3

shall notify Producer in writing of the actual, reasonable and documented Transitional Work Costs (with reasonable supporting documentation thereof), and (i) if the Returned Revenues are equal to or greater than the actual Transitional Work Costs, Producer shall have no further obligation with respect thereto, or (ii) if the Returned Revenues are less than the actual Transitional Work Costs, Gatherer shall, in addition to and delivered contemporaneously with the following Month’s invoice for fees delivered pursuant to Section 13.1, send a separate invoice to Producer setting forth such actual, reasonable and documented Transitional Works Costs and the associated Capital Costs, and Producer shall reimburse Gatherer for all such invoiced Transitional Work Costs, plus the associated Capital Costs. The terms of Section 13.1, 13.2, 13.3, 13.4 and 13.5 shall, for the avoidance of doubt, apply to all Transitional Work Costs included on any invoices. Notwithstanding anything herein to the contrary, in the event that the information included in a Work Notice is materially changed by the Mining Operator after the delivery by Gatherer of the initial Work Notice and prior to the commencement of the applicable Mining Period, Gatherer shall propose to Producer an updated Work Notice under Section 7.5(a).

(d)The Gatherer and Producer agree to coordinate their activities and otherwise cooperate in good faith to minimize, where practical, the incurrence of any additional expense or the loss of revenues by the other in effectuating the curtailment of Services attributable to Planned Mining Operations. Subject to the other terms of this Agreement, the Parties acknowledge and agree that, to the extent that any curtailment is attributable to Planned Mining Operations, such curtailment shall not constitute a breach of any Gatherer obligations set forth in this Agreement.

(e)The Parties hereby acknowledge and agree that in the event that (i) Gatherer (A) fails to timely deliver a Work Notice or (B) fails to perform the Transitional Work set forth in a Work Notice to the extent that Producer elects to approve the Transitional Work, then, in each case, any resulting failure or inability of Gatherer to receive all Gas up to the MDQ that is tendered to Gatherer (or that would have been tendered, but for such curtailment) shall be subject to the terms and conditions of Section 3.8, and shall not be deemed to be caused by Maintenance; and (ii) Gatherer performs the Transitional Work set forth in a Work Notice but such Transitional Work fails to mitigate the curtailment required by the Mining Operations, then any resulting failure or inability of Gatherer to receive all Gas up to the MDQ that is tendered to Gatherer (or that would have been tendered, but for such curtailment) shall be deemed to be caused by Maintenance, and Producer’s remedies shall be limited accordingly, until such time as a Maintenance Deficiency accrues pursuant to the terms hereof.

6.Incremental Compression Fee. All Dedicated Gas delivered from the Gathering System to the Taurus Equitrans Delivery Point shall be subject to an [***] and calculated in accordance with Section 5.1(d)(i) of the Gathering Agreement.

7.Force Majeure. The first sentence of Section 14.2 of the Gathering Agreement is hereby deleted in its entirety and replaced with the following:

“The term “Force Majeure” as used in this Agreement shall mean, to the extent not reasonably within the control of the Party claiming relief and that, by the exercise of reasonable diligence, such Party is unable to prevent or overcome, any of the following events: acts of God, strikes, lockouts or other industrial disturbances, acts of the public enemy, acts of terror, sabotage, wars, blockades, military action, insurrections, riots, epidemics, landslides, unplanned subsidence, unplanned mining operations, lightning, earthquakes, fires, storms or storm warnings, crevasses, floods, washouts, civil disturbances, explosions, breakage or accident to wells, machinery, equipment

4

or lines of pipe, the necessity for testing or making repairs or alterations to wells, machinery, equipment or lines of pipe, freezing of wells, equipment or lines of pipe, inability of any Party hereto to obtain, after the exercise of reasonable diligence, necessary materials, supplies, rights of way, or government authorizations, any action or restraint by any Governmental Authority (so long as the Party claiming relief has not applied for or assisted in the application for, and has opposed where and to the extent reasonable, such action or restraint, and as long as such action or restraint is not the result of a failure by the claiming Party to comply with applicable laws, rules, regulations, or orders).” Notwithstanding anything in this Agreement to the contrary, for the purposes of Section 3.3(e), Force Majeure shall include Planned Mining Operations to the extent they cause or contribute to delay in providing service on or before the Completion Deadline.

8.Effect. The Parties acknowledge and agree that this Amendment constitutes a written instrument executed by the Parties and fulfills the requirements of an amendment contemplated by Section 18.7 of the Gathering Agreement. The Parties hereby ratify and confirm the Gathering Agreement, as amended hereby. Except as expressly provided herein, the provisions of the Gathering Agreement shall remain in full force and effect in accordance with their respective terms following the execution of this Amendment.

9.Governing Law. This Amendment shall be governed by, construed, and enforced in accordance with the laws of the Commonwealth of Pennsylvania without regard to choice of law principles. The Parties agree that the appropriate, exclusive and convenient forum for any disputes among any of the Parties arising out of this Amendment or the transactions contemplated hereby shall be in any state or federal court in the City of Pittsburgh and County of Allegheny, Pennsylvania, and each of the Parties irrevocably submits to the jurisdiction of such courts solely in respect of any proceeding arising out of or related to this Amendment. The Parties further agree that the Parties shall not bring suit with respect to any disputes arising out of this Amendment or the transactions contemplated hereby in any court or jurisdiction other than the above specified courts. EACH PARTY HEREBY WAIVES ITS RIGHT TO TRIAL BY JURY IN ANY PROCEEDING ARISING OUT OF OR RELATING TO THIS AMENDMENT, WHETHER SOUNDING IN CONTRACT, TORT OR OTHERWISE.

10.Counterpart Execution; Approval. This Amendment may be executed in any number of counterparts, each of which shall be considered an original, and all of which shall be considered one and the same instrument. Execution of this Amendment by Gatherer is subject to the approval from Gatherer’s Board of Directors or that of its parent company or equivalent governance body, of the capital necessary for Gatherer to comply with its obligations set forth herein.

11.Miscellaneous Provisions. The provisions of Article 18 of the Gathering Agreement, other than Sections 18.2, 18.3, 18.15, 18.16 and 18.17, shall apply to this Amendment mutatis mutandis.

[Signature Page Follows]

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IN WITNESS WHEREOF, the Parties have executed this Amendment as of the date first written above.

PRODUCER:

EQT CORPORATION,

a Pennsylvania corporation

By:    /s/ Jeremy Knop            

Name: Jeremy Knop    

Title:     Chief Financial Officer    

EQT PRODUCTION COMPANY,

a Pennsylvania corporation

By:    /s/ J.E.B. Bolen            

Name: J.E.B. Bolen        

Title:     Senior Vice President of Operations Planning

RICE DRILLING B LLC,

a Delaware limited liability company

By:    /s/ J.E.B. Bolen            

Name: J.E.B. Bolen        

Title:     Senior Vice President of Operations Planning

EQT ENERGY, LLC,

a Delaware limited liability company

By:    /s/ Keith Shoemaker            

Name: Keith Shoemaker    

Title:    Senior Vice President, Commercial

[Signature Page to Fifth Amendment to Gas Gathering and Compression Agreement]

GATHERER:

EQM GATHERING OPCO, LLC,

a Delaware limited liability company

By:    /s/ John M. Quinn            

Name: John M. Quinn        

Title:    VP Business Development & Commercial Services

[Signature Page to Fifth Amendment to Gas Gathering and Compression Agreement]

Schedule A

Pre-Approved Transitional Work

See Attached information provided to Producer via Work Notice dated September 18, 2023

[***]

Schedule A

EX-10.11

Exhibit 10.11

SPECIFIC TERMS IN THIS LETTER AGREEMENT HAVE BEEN REDACTED BECAUSE SUCH TERMS ARE BOTH NOT MATERIAL AND IS OF TYPE THAT EQUITRANS MIDSTREAM CORPORATION TREATS AS CONFIDENTIAL. THESE REDACTED TERMS HAVE BEEN MARKED IN THIS EXHIBIT AT THE APPROPRIATE PLACE WITH THREE ASTERISKS [***].

October 5, 2023

Rice Drilling B LLC

625 Liberty Avenue, Suite 1700

Pittsburgh, Pa 15222-3111

Attn: J.E.B. Bolen

RE:    Fuel Gas Letter Agreement

Dear Mr. Bolen:

Reference is made to (A) that certain Gathering Agreement for the Hammerhead Gas Gathering System dated February 12, 2018 (as amended, the “Hammerhead Gathering Agreement”) by and between EQT Production Company (“EQT Production”) and EQT Energy, LLC (“EE”) and EQM Gathering Opco, LLC (“Gatherer”), as amended by that certain First Amendment to Gas Gathering Agreement dated June 1, 2019 and that Second Amendment to Gas Gathering Agreement dated April 3, 2020, and (B) that certain Gas Gathering and Compression Agreement dated as of February 26, 2020 by and among EQT Corporation, EQT Production, Rice Drilling B LLC and EE (collectively, “Producer”), and Gatherer, as the same was amended by that certain First Amendment to Gas Gathering and Compression Agreement dated August 26, 2020, that Second Amendment to Gas Gathering and Compression Agreement dated December 6, 2021, that Third Amendment to Gas Gathering Compression Agreement dated December 21, 2021 and that Fourth Amendment to Gas Gathering Compression Agreement dated January 23, 2023 between Producer and Gatherer (as amended, the “Trifecta Gathering Agreement”). All capitalized terms used but not otherwise defined in this letter agreement (“Letter Agreement”) shall have the meanings (if any) ascribed to them in the Hammerhead Gathering Agreement and the Trifecta Gathering Agreement, as applicable.

WHEREAS, Producer has requested that Gatherer commence delivering certain Dedicated Gas to the Delivery Points listed in Exhibit A attached hereto (the “Redelivery Points”, and the Dedicated Gas delivered thereto, “Buyback Gas”) for the purpose of supporting Producer’s hydraulic fracturing operations at the Producer’s Well Pad known as the Teamwork South Pad (“Buyback Gas Well Pad”);

WHEREAS, Producer has requested that Gatherer commence delivering certain Dedicated Gas to the Delivery Point depicted on Exhibit A attached hereto (the “[***]Delivery Point”, and the Dedicated Gas delivered thereto, “[***]Fuel Gas”), via the Hammerhead Gathering System, for the purpose of supporting Producer’s hydraulic fracturing operations at the Producer’s Well Pad known as the [***]Well Pad (“[***]Well Pad”);

WHEREAS, Producer has requested that Gatherer deliver certain Dedicated Gas to the Delivery Points depicted on Exhibit A attached hereto (the “HH Fuel GasDelivery Points”, and the Dedicated Gas delivered thereto, “HH Fuel Gas”), via the Hammerhead Gathering System, for the purpose of supporting Producer’s hydraulic fracturing operations at the Producer’s Well Pads known as the Heart North Pad and the Radcliff South Pad (each an “HH Fuel Gas Well Pad” and collectively, the “HH Fuel Gas Well Pads”);

WHEREAS, Producer has requested that Equitrans, L.P. (“Equitrans”) deliver Gas sourced from its interstate natural gas transmission and storage pipeline system(“TransmissionFuel Gas” and together with the [***]Fuel Gas and the HH Fuel Gas, “Fuel Gas”) to the Delivery Points depicted on Exhibit A attached hereto (the “Transmission Fuel GasDelivery Point” and, together with the [***]Delivery Point and the HH Fuel Gas Delivery Points, the “Fuel GasDelivery Points”) for the purpose of supporting Producer’s hydraulic fracturing operations at the Producer’s Well Pads within the Dedication Area and known as the Carnegie North Pad and the Vanderbilt South Pad (“Transmission Fuel Gas Well Pads”); and

WHEREAS, Gatherer and Equitrans are willing to deliver Buyback Gas to the Redelivery Points and deliver Fuel Gas to the Fuel Gas Delivery Points, as applicable, subject to the terms and conditions hereof.

NOW, THEREFORE, Gatherer, Equitrans and Producer (collectively, “Parties” and each a “Party”), by execution of this Letter Agreement and in consideration of the mutual covenants contained herein, do hereby agree as follows:

1.Buyback Gas.

(a)Following the delivery by Producer to Gatherer of an Additional Confirmation Notice for a Buyback Gas Well Pad, Producer may deliver to Gatherer notice of the date on which Producer requests that buyback service commence at such Buyback Gas Well Pad; provided, however that such date may not be earlier than the “Frac Start Date” for such Buyback Gas Well Pad identified on Exhibit A (each a “Buyback Gas Service Commencement Date”). Beginning on the Buyback Gas Service Commencement Date and continuing thereafter until such time as Producer has completed its hydraulic fracturing operations at the applicable Redelivery Point, Gatherer agrees to make available not less than [***]/day of Buyback Gas for delivery to such Redelivery Point.

(b)Upon the delivery by Producer to Gatherer of an Additional Confirmation Notice for each Buyback Gas Well Pad, Producer shall pay to Gatherer a one-time fee in the amount of [***] Dollars ($[***]), as consideration for Gatherer’s obligation to deliver Buyback Gas to the Redelivery Points in accordance with the terms hereof (“Buyback Gas Fee”).

(c)In the event that Gatherer does not timely commence delivering the volumes of Buyback Gas to a Redelivery Point on or before the applicable Buyback Gas Service Commencement Date for a reason other than Force Majeure or the fault of Producer, then (i) if Gatherer commences delivering Buyback Gas to such Redelivery Point pursuant to the terms hereof within [***] ([***]) , Gatherer shall be obligated to repay a portion of the Buyback Gas Fee applicable thereto to Producer in an amount equal to the product of $[***]and the number of [***]between the (A) applicable

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Buyback Gas Service Commencement Date and (B) the date on which Gatherer has commenced delivering Buyback Gas to such Redelivery Point, and (ii) except as otherwise provided in this Agreement, if Gatherer does not commence delivering Buyback Gas to such Redelivery Point pursuant to the terms hereof within [***], Gatherer shall be obligated to repay [***] percent ([***]%) of the Buyback Gas Fee applicable thereto to Producer. Gatherer agrees to repay all or such applicable portions of the Buyback Gas Fee within [***] after such obligation accrues.

2.[***] Fuel Gas.

(a)During the period commencing upon April 7, 2023 and continuing thereafter until such time as Producer has completed its hydraulic fracturing operations at the [***] Well Pad, Gatherer agrees to make available not less than [***]/day of [***] Fuel Gas received into the Trifecta Gathering System for delivery to the [***] Delivery Point via the Hammerhead Gathering System. The Parties acknowledge and agree that such [***] Fuel Gas shall be received into the Hammerhead Gathering System at the Throckmorton Receipt Point (“Throckmorton Receipt Point”) and delivered to the [***]Delivery Point.

(b)In addition to the Overrun Fee or any other fees payable under the Trifecta Gathering Agreement with respect to [***] Fuel Gas, Producer agrees to pay Gatherer a Fee equal to $[***] per dth for all [***] Fuel Gas volumes flowing to the [***] Delivery Point hereunder (“HH Fee”), which HH Fee shall be invoiced under the Hammerhead Gathering Agreement

(c)All [***]Fuel Gas volumes flowing to the [***] Delivery Point hereunder shall be [***].

3.HH Fuel Gas.

(a)Producer may deliver to Gatherer at any time notice of the date on which Producer requests fuel gas service commence at each HH Fuel Gas Well Pad; provided, however, that such date shall not be earlier than the “Frac Start Date” for such HH Fuel Gas Well Pad identified on ExhibitA(each, “HH Fuel Gas Service Commencement Date”). Beginning on the HH Fuel Gas Service Commencement Date and continuing thereafter until such time as Producer has completed its hydraulic fracturing operations, Gatherer agrees to make available not less than [***]/day of HH Fuel Gas for delivery to the applicable HH Fuel Gas Delivery Point.

(b)Upon the delivery by Producer to Gatherer of an Additional Confirmation Notice for each HH Fuel Gas Well Pad, Producer shall pay to Gatherer a one-time fee in the amount of [***] Dollars ($[***]), as consideration for Gatherer’s obligation to deliver HH Fuel Gas to such HH Fuel Gas Delivery Point (“HH Fuel Gas Delivery Fee”).

(c)In the event that Gatherer does not timely commence delivering the volumes of HH Fuel Gas to an HH Fuel Gas Delivery Point on or before the applicable HH Fuel Gas Service Commencement Date for a reason other than Force Majeure or the fault of Producer, then (i) if Gatherer commences delivering HH Fuel Gas to such HH Fuel Gas Delivery Point pursuant to the terms hereof within [***], Gatherer shall be obligated to repay a portion of the HH Fuel Gas Delivery Fee applicable thereto to Producer in an amount equal to the product of $[***] and the number of [***]between

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the (A) applicable HH Fuel Gas Service Commencement Date and (B) the date on which Gatherer has commenced delivering HH Fuel Gas to such HH Fuel Gas Delivery Point, and (ii) except as otherwise provided in this Agreement, if Gatherer does not commence delivering HH Fuel Gas to such HH Fuel Gas Delivery Point pursuant to the terms hereof with [***], Gatherer shall be obligated to repay [***]percent ([***]%) of the HH Fuel Gas Delivery Fee applicable thereto to Producer. Gatherer agrees to repay all or such applicable portions of the HH Fuel Gas Delivery Fee within[***] after such obligation accrues.

4.Transmission Fuel Gas.

(a) Producer may deliver to Gatherer at any time notice of the date on which Producer requests fuel gas service commence at each Transmission Fuel Gas Well Pad; provided, however, that such date shall not be earlier than the “Frac Start Date” for such Transmission Fuel Gas Well Pad identified on Exhibit A (each, a “Transmission Fuel Gas Service Commencement Date”). Beginning on the Transmission Fuel Gas Service Commencement Date, Equitrans agrees to make available not less than [***]/day of Transmission Fuel Gas for delivery to the applicable Transmission Fuel Gas Delivery Point during the period commencing upon the Transmission Fuel Gas Service Commencement Date and continuing thereafter until such time as Producer has completed its hydraulic fracturing operations.

(b)Upon the delivery by Producer to Gatherer of an Additional Confirmation Notice for each Transmission Fuel Gas Well Pad, Producer shall pay to Equitrans a one-time fee in the amount of [***]Dollars ($[***]), as consideration for Equitrans’ obligation to deliver Transmission Fuel Gas to such Transmission Fuel Gas Delivery Point (“Transmission Fuel Gas Delivery Fee”).

(c)In the event that Equitrans does not timely commence delivering the volumes of Transmission Fuel Gas to a Transmission Fuel Gas Delivery Point on or before the applicable Transmission Fuel Gas Service Commencement Date for a reason other than Force Majeure or the fault of Producer, then (i) if Equitrans commences delivering Transmission Fuel Gas to such Transmission Fuel Gas Delivery Point pursuant to the terms hereof within [***], Equitrans shall be obligated to repay a portion of the Transmission Fuel Gas Delivery Fee applicable theretoto Producer in an amount equal to the product of $[***] and the number of [***]between the (i) applicable Transmission FuelGas Service Commencement Date and (ii) the date on which Gatherer has commenced delivering Transmission Fuel Gas to such Transmission Fuel Gas Delivery Point, and (ii) except as otherwise provided in this Agreement, if Equitrans does not commence delivering Transmission Fuel Gas to such Transmission Fuel Gas Delivery Point pursuant to the terms hereof with [***], Equitrans shall be obligated to repay [***]percent ([***]%) of the Transmission Fuel Gas Delivery Fee applicable thereto to Producer. Gatherer agrees to repay all or such applicable portions of the Transmission Fuel Gas Delivery Fee within [***]([***]) Days after such obligation accrues.

(d)The Transmission Fuel Gas shall be delivered to the Transmission Fuel Gas Delivery Points under and subject to an ITS Transportation Services Agreement (“ITS Agreement”) in the form attached hereto as Exhibit B. Producer and Equitrans will enter into the ITS Agreement contemporaneously with this Letter Agreement.

5.Additional Covenants.

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(a)Producer shall be obligated to construct and install a temporary fuel line and any necessary appurtenant facilities extending from Gatherer’s facilities at each Fuel Gas Delivery Point to the applicable Well Pad, consistent with Gatherer’s reasonable and customary operational standards and requirements.

(b)All of the obligations of Producer and Gatherer hereunder shall be performed in compliance with the performance standard set forth in Section 3.1 of the Trifecta Gathering Agreement.

(c)Producer shall provide to Gatherer daily custody measurement data on a weekly basis confirming volumes of Fuel Gas delivered to each Fuel Gas Delivery Point.

(d)Notwithstanding anything herein to the contrary, this Letter Agreement shall not amend or otherwise modify the obligations of the Parties with respect to the connection of any future Redelivery Points to the Gathering System under Section 3.10 of the Gathering Agreement and the other terms and conditions thereof.

6.Indemnification.

(a)Subject to the terms of this Letter Agreement, including Section 6(c), Gatherer shall release, indemnify, defend, and hold harmless Producer and its Affiliates, directors, officers, employees, agents, consultants, representatives, and invitees from and against all claims and losses arising out of or relating to (i) the operations of Gatherer or its Affiliates under this Letter Agreement and (ii) any breach of this Letter Agreement by Gatherer.

(b)Subject to the terms of this Letter Agreement, including Section 6(c), Producer shall release, indemnify, defend, and hold harmless Gatherer and its Affiliates, directors, officers, employees, agents, consultants, representatives, and invitees from and against all claims and losses arising out of or relating to (i) the operations of Producer and its Affiliates under this Letter Agreement, and (ii) any breach of this Letter Agreement by Producer.

(c)NOTWITHSTANDING ANYTHING IN THIS LETTER AGREEMENT TO THE CONTRARY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER PARTY FOR SPECIAL, INDIRECT, CONSEQUENTIAL, PUNITIVE OR EXEMPLARY DAMAGES SUFFERED BY SUCH PARTY RESULTING FROM OR ARISING OUT OF THIS LETTER AGREEMENT OR THE BREACH THEREOF OR UNDER ANY OTHER THEORY OF LIABILITY, WHETHER TORT, NEGLIGENCE, STRICT LIABILITY, BREACH OF CONTRACT, WARRANTY, INDEMNITY OR OTHERWISE, INCLUDING LOSS OF USE, INCREASED COST OF OPERATIONS, LOSS OF PROFIT OR REVENUE, OR BUSINESS INTERRUPTIONS; PROVIDED, HOWEVER, THAT THE FOREGOING LIMITATION SHALL NOT APPLY TO ANY (a) ACTUAL AMOUNT OF FEES TO BE PAID PURSUANT TO THE TERMS HEREOF, OR (b) DAMAGE OR CLAIM ASSERTED BY OR AWARDED TO A THIRD PARTY FOR WHICH A PARTY WOULD OTHERWISE BE LIABLE UNDER ANY INDEMNIFICATION PROVISION SET FORTH HEREIN.

6.    Trifecta Fifth Amendment. In consideration for the agreement of Gatherer and Equitrans to deliver Buyback Gas to the Redelivery Point and deliver Fuel

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Gas to the Fuel Gas Delivery Points in accordance with the terms and conditions hereof, the Parties shall, simultaneously with the execution of this Letter Agreement, enter into that certain Fifth Amendment to the Trifecta Gathering Agreement attached hereto as Exhibit C (the “Fifth Amendment”), which Fifth Amendment shall, among other things, set forth provisions governing over the rights and obligations of Gatherer and Producer in the event of planned mining operations in the vicinity of the Gathering System.

7.    Miscellaneous. The terms and provisions of this Letter Agreement shall be binding on, and shall inure to the benefit of, the Parties and their respective successors and permitted assigns. This Letter Agreement may be executed in any number of counterparts, and each such counterpart hereof shall be deemed to be an original instrument, but all of such counterparts shall constitute for all purposes one agreement. Any signature hereto delivered by a Party by facsimile or other electronic transmission (including scanned documents delivered by email) shall be deemed an original signature hereto, and execution and delivery by such means shall be binding upon the Parties.

8.    Effect of Letter Agreement. The Parties acknowledge and agree that this Letter Agreement constitutes a written instrument executed by the Parties and fulfills the requirements of an amendment contemplated by (a) Section 17.8 of the Hammerhead Gathering Agreement, and (b) Section 18.7 of the Trifecta Gathering Agreement; provided, however, that except as expressly provided herein, the Parties hereby reserve all of their rights and remedies under the Trifecta Gathering Agreement and the Hammerhead Gathering Agreement, and under applicable law and nothing herein will constitute a waiver, release, modification or alteration of the terms, conditions or covenants of the Trifecta Gathering Agreement and the Hammerhead Gathering Agreement, the provisions of which are intended to remain in full force and effect in accordance with their respective terms, except to the extent expressly contemplated hereby. In the event of any conflict or inconsistencies between this Letter Agreement, the Trifecta Gathering Agreement and the Hammerhead Gathering Agreement, the terms and conditions of this Letter Agreement shall prevail.

9.    Governing Law; Jury Waiver. This Letter Agreement shall be governed by, construed, and enforced in accordance with the laws of the Commonwealth of Pennsylvania without regard to choice of law principles. The Parties agree that the appropriate, exclusive and convenient forum for any disputes among any of the Parties arising out of this Letter Agreement or the transactions contemplated hereby shall be in any state or federal court in the City of Pittsburgh and County of Allegheny, Pennsylvania, and each of the Parties irrevocably submits to the jurisdiction of such courts solely in respect of any proceeding arising out of or related to this Letter Agreement. The Parties further agree that the Parties shall not bring suit with respect to any disputes arising out of this Letter Agreement or the transactions contemplated hereby in any court or jurisdiction other than the above specified courts. EACH PARTY HEREBY WAIVES ITS RIGHT TO TRIAL BY JURY IN ANY PROCEEDING ARISING OUT OF OR RELATING TO THIS LETTER AGREEMENT, WHETHER SOUNDING IN CONTRACT, TORT OR OTHERWISE.

[SIGNATURE PAGE FOLLOWS]

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

GATHERER:

EQM GATHERING OPCO, LLC,

a Delaware limited liability company

By: /s/ John M. Quinn        

Name: John M. Quinn        

Title:    VP Business Development & Commercial Services

EQUITRANS, L.P.,

a Pennsylvania limited partnership

By: Equitrans Services, LLC, its general partner

By: Equitrans Investments, LLC, its member

By: EQM Midstream Partners, LP, its sole member

By: EQGP Services, LLC, its general partner

By:     /s/ John M. Quinn        

Name: John M. Quinn        

Title:    VP Business Development & Commercial Services

PRODUCER:

RICE DRILLING B LLC,

a Delaware limited liability company

By: /s/ J.E.B. Bolen             

Name: J.E.B. Bolen        

Title:     Senior Vice President of Operations Planning

EQT CORPORATION,

a Pennsylvania corporation

By:     /s/ Jeremy Knop        

Name: Jeremy Knop    

Title:     Chief Financial Officer

EQT ENERGY, LLC,

a Delaware limited liability company

By:    /s/ Keith Shoemaker        

Name: Keith Shoemaker    

Title:    Senior Vice President, Commercial

EQT PRODUCTION COMPANY,

a Delaware limited liability company

By:    /s/ J.E.B. Bolen        

Name: J.E.B. Bolen        

Title:     Senior Vice President of Operations Planning

EXHIBIT A

Redelivery Points; Fuel Gas Delivery Points

Well Pad	Category	Frac Start Date
[***]	[***]Fuel Gas Well Pad	[***]
Heart North	HH Fuel Gas Well Pad	[***]
Radcliff South	HH Fuel Gas Well Pad	[***]
Teamwork South	Buyback Gas Well Pad	[***]
Carnegie North	Transmission Fuel Gas Well Pads	[***]
Vanderbilt South	Transmission Fuel Gas Well Pads	[***]

EXHIBIT B

ITS Agreement

[See Attached]

OPTIONAL EXHIBIT B

to the TRANSPORTATION SERVICE AGREEMENT

between EQUITRANS, L.P. and

EQT Energy, LLC, pursuant to Rate Schedule ITS Contract No. 1832 Dated 8/12/21

Date of this Optional Exhibit B: 10/5/23 Effective Date of this Optional Exhibit B: 7/1/24 Supersedes Optional Exhibit B Dated:

Discounted Rate Agreement

1.In accordance with Section 6.25 of the General Terms and Conditions of Equitrans’ Tariff, Equitrans and Customer agree that the following discounted rates and any discount terms will apply under the Agreement:

The rates for service to be paid by Customer to Equitrans to the Delivery Points of Carnegie North (Meter # FR-TRNS-ML) or Vanderbilt South (Meter # FR-TRNS-ML) shall be:

Usage Charge: [***]

Customer shall pay all applicable surcharges, including FERC ACA surcharge.

Except as expressly stated herein, Equitrans’ applicable maximum rates and charges set forth in the Statement of Rates of its Tariff continue to apply.

2.This Exhibit B is effective 7/1/24 and continues in effect through 12/31/25.

3.All rates and services described in the Agreement and this Exhibit B are subject to the terms and conditions of Equitrans’ Tariff. If one rate component which was at or below the applicable maximum rate at the time the discount agreement was executed subsequently exceeds the applicable maximum rate or is less than the applicable minimum rate due to a change in Equitrans’ maximum (minimum) rates so that such rate component must be adjusted downward (upward) to equal the new applicable maximum (minimum) rate, the other rate components may be adjusted upward (downward) to

achieve the agreed overall rate, so long as none of the resulting rate components exceed the maximum rate or are less than the minimum rate applicable to that rate component. Such changes to rate components shall be applied prospectively, commencing with the date a Commission order accepts revised tariff sections. Nothing contained herein shall be construed to alter a refund obligation under applicable law for any period during which rates which had been charged under a discount agreement exceeded rates which ultimately are found to be just and reasonable.

4.In the event any provision of this Exhibit B is held to be invalid, illegal or unenforceable by any court, regulatory agency, or tribunal of competent jurisdiction, the validity, legality, and enforceability of the remaining provisions, terms or conditions shall not in any way be affected or impaired thereby, and the term, condition, or provision which is held illegal or invalid shall be deemed modified to conform to such rule of law, but only for the period of time such order, rule, regulation, or law is in effect.

5.Other Special Provisions:

None.

IN WITNESS WHEREOF, Customer and Equitrans have executed this Exhibit B by their duly authorized officers, effective as of the date indicated above.

CUSTOMER:	EQUITRANS, L.P.:
By
(Date) Keith Shoemaker	(Date) John M. Quinn
Title: Senior Vice President, Commercial	Title Vice President, Business Development and Commercial Services

EXHIBIT C

Fifth Amendment to Gas Gathering and Compression Agreement

[See Attached]

SPECIFIC TERMS IN THIS LETTER AGREEMENT HAVE BEEN REDACTED BECAUSE SUCH TERMS ARE BOTH NOT MATERIAL AND IS OF TYPE THAT EQUITRANS MIDSTREAM CORPORATION TREATS AS CONFIDENTIAL. THESE REDACTED TERMS HAVE BEEN MARKED IN THIS EXHIBIT AT THE APPROPRIATE PLACE WITH THREE ASTERISKS [***].

FIFTH AMENDMENT TO

GAS GATHERING AND COMPRESSION AGREEMENT

THIS FIFTH AMENDMENT TO GAS GATHERING AGREEMENT AND COMPRESSION AGREEMENT (this “Amendment”), dated October 4, 2023 (“Effective Date”), is made and entered into by and among EQT Corporation, EQT Production Company, Rice Drilling B LLC, and EQT Energy, LLC (collectively, “Producer”), and EQM Gathering Opco, LLC (“Gatherer”) (as amended, the “Gathering Agreement”). Producer and Gatherer may be referred to herein individually as a “Party” or collectively as the “Parties.”

1.RECITALS

WHEREAS, the Parties entered into that certain Gas Gathering and Compression Agreement dated as of February 26, 2020, as amended by that certain First Amendment to Gas Gathering and Compression Agreement among the Parties dated August 26, 2020, that certain Second Amendment to Gas Gathering and Compression Agreement among the Parties dated December 6, 2021, that certain Third Amendment to Gas Gathering and Compression Agreement among the Parties dated December 21, 2021 and that certain Fourth Amendment to Gas Gathering and Compression Agreement among the Parties dated January 23, 2023 (the “Gathering Agreement”); and

WHEREAS, the Parties desire to amend the Gathering Agreement in accordance with the terms and conditions set forth in this Amendment and in connection with that certain Letter Agreement re: Fuel Gas by and among the Parties and Equitrans, L.P., dated as of the date hereof (the “Letter Agreement”).

NOW, THEREFORE, in consideration of the mutual covenants set forth herein and in the Letter Agreement, and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the Parties hereby agree as follows:

2.AGREEMENT

1.Defined Terms. Defined terms used but not defined herein shall have the meanings given to such terms in the Gathering Agreement.

2.New Definitions. The following definitions are added to Article I of the Gathering Agreement:

“Capital Costs” – means, with respect to Transitional Work Costs approved pursuant to the terms hereof and properly invoiced to Produced hereunder, an amount equal to (i) such Transitional Work Costs multiplied by (ii) [***].

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“Mining Operations” – means surface or subsurface activity necessary to operate a coal mine and/or extract coal, including development mining, long wall mining, surface mining, coal processing, pre-mining and post-mining removal of methane from coal or surrounding coal strata, drilling exploration holes and gob vent boreholes, and installing or operating portals, shafts, fans, other surface structures, pipelines, power lines, water lines, pumps and compressors and all operations, ground control, subsidence and/or subsidence control measures reasonably related to or arising from the foregoing.

“Mining Operator” – means any Third Party operator, owner or controller that conducts Mining Operations, including without limitation, [***].

“Mining Period” – means the duration of Planned Mining Operations.

“Planned Mining Operations” – means any and all present or future Mining Operations which are planned to be conducted in the vicinity of a portion of the Gathering System by a Mining Operator which would reasonably be expected to require Gatherer to (i) interrupt or curtail Services during the Mining Period and/or (ii) perform Transitional Work and incur expense in order to ensure the continued safe operation of such portion of the Gathering System during the Mining Period, as indicated by Gatherer in a written Work Notice.

“Returned Revenues” – means, with respect to a Planned Mining Operation that would in the absence of the performance of the Transitional Work proposed by Gatherer in the applicable Work Notice require the curtailment of any portion of the Gathering System, the [***]. To the extent the Work Notice includes multiple longwall panels or sections (as reasonably defined by the Mining Operator), Returned Revenues shall be calculated in a manner such that they are not double counted.

“Transitional Work” – As defined in Section 7.5(b).

“Transitional Work Costs” – means the third party out-of-pocket costs that Gatherer incurs in order to perform the Transitional Work impacted by the Planned Mining Operations during the Mining Period. To the extent the Work Notice includes multiple longwall panels or sections (as reasonably defined by the Mining Operator), Transactional Work Costs shall be calculated in a manner such that they are not double counted.

“Work Rejection” – As defined in Section 7.5(b).

“Work Notice” – As defined in Section 7.5(a).

3.Temporary Release. The first parenthetical in the first sentence of Section 3.8 of the Gathering Agreement is hereby deleted in its entirety and replaced with the following:

“(other than those caused or contributed to by (a) the actions or inactions of any member of the Producer Group resulting in Gatherer being unable to accept or deliver Gas or comply with the terms hereof, (b) any event of Force Majeure declared by Producer, (c) Maintenance (except to the extent such Maintenance results in a Maintenance Deficiency), (d) the breach of this

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Agreement by any member of Producer Group or (e) a Work Rejection in connection with Planned Mining Operations)”

4.Permanent Release. The first parenthetical in the first sentence of Section 3.9(a) of the Gathering Agreement is hereby deleted in its entirety and replaced with the following:

“(other than those caused or contributed to by (i) the actions or inactions of any member of the Producer Group resulting in Gatherer being unable to accept or deliver Gas or comply with the terms hereof, (ii) an event of Force Majeure, (iii) Maintenance, (iv) the breach of this Agreement by any member of Producer Group or (v) a Work Rejection in connection with Planned Mining Operations)”

5.Planned Mining Operations. Section 7.5 is added to the Gathering Agreement to read as follows:

“Section 7.5    Planned Mining Operations. The following process shall apply in the event of Planned Mining Operations:

(a)Gatherer shall provide Producer with written notice (“Work Notice”) of the anticipated commencement of Planned Mining Operations not later than the later of (i) [***] ([***])following the delivery to Gatherer of a notice thereof from a Mining Operator (including any updates to prior notices), and (ii) at least [***] ([***]) prior to the anticipated commencement of a Mining Period. Each Work Notice shall set forth the estimated duration of the Mining Period, the mine section (as reasonably defined by the Mining Operator) in which the Planned Mining Operations are located, and the portions of the Gathering System affected thereby and describe (i) the work, including without limitation exposing, bracing, shutting in and/or relocating such portion of the Gathering System, as applicable, that would be required for Gatherer to ensure the continued operation of the affected portion of the Gathering System during the Mining Period (“Transitional Work”), (ii) the Transitional Work Costs associated therewith, and (iii) the Returned Revenues associated therewith. A Work Notice with respect to the Planned Mining Operations of [***] described on Schedule A to this Amendment shall be deemed to have been timely delivered, and Producer shall have elected to approve the Transitional Work proposed by Gatherer therein.

(b)If Gatherer delivers the Work Notice in accordance with Section 7.5(a), Producer may, within [***] of receiving such Work Notice, by written notice to Gatherer, elect to approve or reject the Transitional Work proposed by Gatherer therein. In the event that Producer elects to reject the proposal set forth in such Work Notice (or does not approve the proposal within such [***] period) (a “Work Rejection”), then Gatherer shall (i) have no obligation to perform the Transitional Work, and (ii) shall be permitted to interrupt or curtail Service during the Mining Period with respect to the portions of the Gathering System described as affected in the Work Notice to the extent such interruption or curtailment is a result of the Mining Operations, free and clear of any claim of a reduction in the Minimum Volume Commitment, permanent release or other remedy hereunder; provided, however, that Producer may elect to treat the Dedicated Gas subject to such curtailment as Temporarily Released for the duration of the applicable Mining Period.

(c)If Producer approves the Transitional Work, Gatherer will complete the Transitional Work prior to the commencement of the Mining Period at Gatherer’s sole cost and expense, subject to the terms of this Section 7.5(d). Following the expiration of the applicable Mining Period and Gatherer’s determination of the actual Transitional Work Costs, Gatherer

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shall notify Producer in writing of the actual, reasonable and documented Transitional Work Costs (with reasonable supporting documentation thereof), and (i) if the Returned Revenues are equal to or greater than the actual Transitional Work Costs, Producer shall have no further obligation with respect thereto, or (ii) if the Returned Revenues are less than the actual Transitional Work Costs, Gatherer shall, in addition to and delivered contemporaneously with the following Month’s invoice for fees delivered pursuant to Section 13.1, send a separate invoice to Producer setting forth such actual, reasonable and documented Transitional Works Costs and the associated Capital Costs, and Producer shall reimburse Gatherer for all such invoiced Transitional Work Costs, plus the associated Capital Costs. The terms of Section 13.1, 13.2, 13.3, 13.4 and 13.5 shall, for the avoidance of doubt, apply to all Transitional Work Costs included on any invoices. Notwithstanding anything herein to the contrary, in the event that the information included in a Work Notice is materially changed by the Mining Operator after the delivery by Gatherer of the initial Work Notice and prior to the commencement of the applicable Mining Period, Gatherer shall propose to Producer an updated Work Notice under Section 7.5(a).

(d)The Gatherer and Producer agree to coordinate their activities and otherwise cooperate in good faith to minimize, where practical, the incurrence of any additional expense or the loss of revenues by the other in effectuating the curtailment of Services attributable to Planned Mining Operations. Subject to the other terms of this Agreement, the Parties acknowledge and agree that, to the extent that any curtailment is attributable to Planned Mining Operations, such curtailment shall not constitute a breach of any Gatherer obligations set forth in this Agreement.

(e)The Parties hereby acknowledge and agree that in the event that (i) Gatherer (A) fails to timely deliver a Work Notice or (B) fails to perform the Transitional Work set forth in a Work Notice to the extent that Producer elects to approve the Transitional Work, then, in each case, any resulting failure or inability of Gatherer to receive all Gas up to the MDQ that is tendered to Gatherer (or that would have been tendered, but for such curtailment) shall be subject to the terms and conditions of Section 3.8, and shall not be deemed to be caused by Maintenance; and (ii) Gatherer performs the Transitional Work set forth in a Work Notice but such Transitional Work fails to mitigate the curtailment required by the Mining Operations, then any resulting failure or inability of Gatherer to receive all Gas up to the MDQ that is tendered to Gatherer (or that would have been tendered, but for such curtailment) shall be deemed to be caused by Maintenance, and Producer’s remedies shall be limited accordingly, until such time as a Maintenance Deficiency accrues pursuant to the terms hereof.

6.Incremental Compression Fee. All Dedicated Gas delivered from the Gathering System to the Taurus Equitrans Delivery Point shall be subject to an [***] and calculated in accordance with Section 5.1(d)(i) of the Gathering Agreement.

7.Force Majeure. The first sentence of Section 14.2 of the Gathering Agreement is hereby deleted in its entirety and replaced with the following:

“The term “Force Majeure” as used in this Agreement shall mean, to the extent not reasonably within the control of the Party claiming relief and that, by the exercise of reasonable diligence, such Party is unable to prevent or overcome, any of the following events: acts of God, strikes, lockouts or other industrial disturbances, acts of the public enemy, acts of terror, sabotage, wars, blockades, military action, insurrections, riots, epidemics, landslides, unplanned subsidence, unplanned mining operations, lightning, earthquakes, fires, storms or storm warnings, crevasses, floods, washouts, civil disturbances, explosions, breakage or accident to wells, machinery, equipment

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or lines of pipe, the necessity for testing or making repairs or alterations to wells, machinery, equipment or lines of pipe, freezing of wells, equipment or lines of pipe, inability of any Party hereto to obtain, after the exercise of reasonable diligence, necessary materials, supplies, rights of way, or government authorizations, any action or restraint by any Governmental Authority (so long as the Party claiming relief has not applied for or assisted in the application for, and has opposed where and to the extent reasonable, such action or restraint, and as long as such action or restraint is not the result of a failure by the claiming Party to comply with applicable laws, rules, regulations, or orders).” Notwithstanding anything in this Agreement to the contrary, for the purposes of Section 3.3(e), Force Majeure shall include Planned Mining Operations to the extent they cause or contribute to delay in providing service on or before the Completion Deadline.

8.Effect. The Parties acknowledge and agree that this Amendment constitutes a written instrument executed by the Parties and fulfills the requirements of an amendment contemplated by Section 18.7 of the Gathering Agreement. The Parties hereby ratify and confirm the Gathering Agreement, as amended hereby. Except as expressly provided herein, the provisions of the Gathering Agreement shall remain in full force and effect in accordance with their respective terms following the execution of this Amendment.

9.Governing Law. This Amendment shall be governed by, construed, and enforced in accordance with the laws of the Commonwealth of Pennsylvania without regard to choice of law principles. The Parties agree that the appropriate, exclusive and convenient forum for any disputes among any of the Parties arising out of this Amendment or the transactions contemplated hereby shall be in any state or federal court in the City of Pittsburgh and County of Allegheny, Pennsylvania, and each of the Parties irrevocably submits to the jurisdiction of such courts solely in respect of any proceeding arising out of or related to this Amendment. The Parties further agree that the Parties shall not bring suit with respect to any disputes arising out of this Amendment or the transactions contemplated hereby in any court or jurisdiction other than the above specified courts. EACH PARTY HEREBY WAIVES ITS RIGHT TO TRIAL BY JURY IN ANY PROCEEDING ARISING OUT OF OR RELATING TO THIS AMENDMENT, WHETHER SOUNDING IN CONTRACT, TORT OR OTHERWISE.

10.Counterpart Execution; Approval. This Amendment may be executed in any number of counterparts, each of which shall be considered an original, and all of which shall be considered one and the same instrument. Execution of this Amendment by Gatherer is subject to the approval from Gatherer’s Board of Directors or that of its parent company or equivalent governance body, of the capital necessary for Gatherer to comply with its obligations set forth herein.

11.Miscellaneous Provisions. The provisions of Article 18 of the Gathering Agreement, other than Sections 18.2, 18.3, 18.15, 18.16 and 18.17, shall apply to this Amendment mutatis mutandis.

[Signature Page Follows]

20

IN WITNESS WHEREOF, the Parties have executed this Amendment as of the date first written above.

PRODUCER:

EQT CORPORATION,

a Pennsylvania corporation

By:

Name: Jeremy Knop    

Title:     Chief Financial Officer    

EQT PRODUCTION COMPANY,

a Pennsylvania corporation

By:

Name: J.E.B. Bolen        

Title:     Senior Vice President of Operations Planning

RICE DRILLING B LLC,

a Delaware limited liability company

By:

Name: J.E.B. Bolen        

Title:     Senior Vice President of Operations Planning

EQT ENERGY, LLC,

a Delaware limited liability company

By:

Name: Keith Shoemaker    

Title:    Senior Vice President, Commercial

[Signature Page to Fifth Amendment to Gas Gathering and Compression Agreement]

GATHERER:

EQM GATHERING OPCO, LLC,

a Delaware limited liability company

By:

Name: John M. Quinn        

Title:    VP Business Development & Commercial Services

[Signature Page to Fifth Amendment to Gas Gathering and Compression Agreement]

Schedule A

Pre-Approved Transitional Work

See Attached information provided to Producer via Work Notice dated September 18, 2023

[***]

[Signature Page to Fifth Amendment to Gas Gathering and Compression Agreement]

EX-10.12

Exhibit 10.12

SPECIFIC TERMS IN THIS LETTER AGREEMENT HAVE BEEN REDACTED BECAUSE SUCH TERMS ARE BOTH NOT MATERIAL AND IS OF TYPE THAT EQUITRANS MIDSTREAM CORPORATION TREATS AS CONFIDENTIAL. THESE REDACTED TERMS HAVE BEEN MARKED IN THIS EXHIBIT AT THE APPROPRIATE PLACE WITH THREE ASTERISKS [***].

October 12, 2023

Rice Drilling B LLC

625 Liberty Avenue, Suite 1700

Pittsburgh, Pa 15222-3111

Attn: J.E.B. Bolen

RE:    Amended and Restated Letter Agreement – [***]

Dear Mr. Bolen:

Reference is made to that certain Gas Gathering and Compression Agreement dated as of February 26, 2020 by and among EQT Corporation, EQT Production Company, Rice Drilling B LLC and EQT Energy, LLC (collectively, “Producer”), and EQM Gathering Opco, LLC (“Gatherer”), as the same was amended by that certain First Amendment to Gas Gathering and Compression Agreement dated August 26, 2020, that Second Amendment to Gas Gathering and Compression Agreement dated December 6, 2021, that Third Amendment to Gas Gathering Compression Agreement dated December 21, 2021, that Fourth Amendment to Gas Gathering Compression Agreement dated January 23, 2023 and that Fifth Amendment to Gas Gathering Compression Agreement dated October 4, 2023 between Producer and Gatherer (as amended, the “Gathering Agreement”). All capitalized terms used but not otherwise defined in this letter agreement (“Letter Agreement”) shall have the meanings (if any) ascribed to them in the Gathering Agreement.

WHEREAS, the Producer’s Well Pad known as the [***]Well Pad, which is or will be connected to a Receipt Point located on the [***]System AMI and depicted on Exhibit A attached hereto (“[***]Well Pad”), has an Anticipated Production Date of [***] based on the applicable Additional Confirmation Notice;

WHEREAS, Producer has requested that Gatherer commence receiving Dedicated Gas into the Gathering System at the [***]Well Pad (“[***]Receipt Point”) as of [***] or such earlier date as the Parties mutually agree in writing (including email) (“Requested Service Date”); and

WHEREAS, Gatherer is willing to commence receiving Dedicated Gas at the [***] Receipt Point from and after the Requested Service Date, subject to the terms and conditions hereof;

WHEREAS, Producer and Gatherer are parties to that certain Letter Agreement – [***] dated October 3, 2023 (“Original Letter Agreement”); and

WHEREAS, Producer and Gatherer desire to amend and restate the Original Letter Agreement and accordingly, the Parties are entering into this Letter Agreement, which shall amend and restate the Original Letter Agreement in its entirety.

NOW, THEREFORE, Gatherer and Producer (collectively, “Parties” and each a “Party”), by execution of this Letter Agreement and in consideration of the mutual covenants contained herein, do hereby agree as follows:

1. Service Commencement; [***]Shut-In Period. Subject to the terms and conditions of this Letter Agreement:

(a)Gatherer agrees to begin accepting Dedicated Gas into the Gathering System at the [***]Receipt Point on the Requested Service Date, and Producer’s and Gatherer’s rights, remedies and obligations with respect to the delivery and receipt of Dedicated Gas shall apply to Dedicated Gas delivered at the [***]Receipt Point following the Requested Service Date;

(b)Producer agrees to shut-in production of Dedicated Gas from its Well Pads known as the [***] (each a “[***] Receipt Point” and collectively, the “[***]Receipt Points”) during the period commencing on or before the Requested Service Date and continuing until the earlier of (i) Gatherer’s completion of the installation work described in clause (c) below and (ii) [***] (the “[***]Shut-In Period”). For the avoidance of doubt, Producer acknowledges and agrees that the shut-in of the [***]Receipt Points during the [***]Shut-In Period is intended to prevent [***]in the Gathering System and does not represent a failure by Gatherer to receive Dedicated Gas at the [***]Receipt Points which could result in a Temporary Release as contemplated in Section 3.8 of the Gathering Agreement;

(c)Gatherer agrees to complete the installation of (i) pad-level dehydration facilities upstream of each [***]Receipt Point except for the [***] and (ii) a heater at the [***]Well Pad, which facilities and installation shall be completed, in each case, to applicable industry standards and not later than [***];

(d)Producer agrees that Dedicated Gas delivered to the [***]Receipt Point during the [***]Shut-In Period shall maintain a minimum temperature of [***];

(e)Notwithstanding anything herein to the contrary, this Letter Agreement shall not amend or otherwise modify the obligations of the Parties with respect to the connection of any future Receipt Points to the Gathering System under the Gathering Agreement and the other terms and conditions thereof.

2.    Miscellaneous. The terms and provisions of this Letter Agreement shall be binding on, and shall inure to the benefit of, the Parties and their respective successors and permitted assigns. This Letter Agreement may be executed in any number of counterparts, and each such counterpart hereof shall be deemed to be an original instrument, but all of such counterparts shall constitute for all purposes one agreement. Any signature hereto delivered by a Party by facsimile or other electronic transmission (including scanned documents delivered by email) shall be deemed an original signature hereto, and execution and delivery by such means shall be binding upon the Parties.

2

3.    Effect of Letter Agreement. The Parties acknowledge and agree that this Letter Agreement constitutes a written instrument executed by the Parties and fulfills the requirements of an amendment contemplated by Section 18.7 of the Gathering Agreement. The Parties hereby ratify and confirm the Gathering Agreement, as amended hereby. Except as expressly provided herein, the provisions of the Gathering Agreement shall remain in full force and effect in accordance with their respective terms following the execution of this Letter Agreement. In the event of any conflict or inconsistencies between this Letter Agreement and the Gathering Agreement, the terms and conditions of this Letter Agreement shall prevail.

4.    Governing Law; Jury Waiver. This Letter Agreement shall be governed by, construed, and enforced in accordance with the laws of the Commonwealth of Pennsylvania without regard to choice of law principles. The Parties agree that the appropriate, exclusive and convenient forum for any disputes among any of the Parties arising out of this Letter Agreement or the transactions contemplated hereby shall be in any state or federal court in the City of Pittsburgh and County of Allegheny, Pennsylvania, and each of the Parties irrevocably submits to the jurisdiction of such courts solely in respect of any proceeding arising out of or related to this Letter Agreement. The Parties further agree that the Parties shall not bring suit with respect to any disputes arising out of this Letter Agreement or the transactions contemplated hereby in any court or jurisdiction other than the above specified courts. EACH PARTY HEREBY WAIVES ITS RIGHT TO TRIAL BY JURY IN ANY PROCEEDING ARISING OUT OF OR RELATING TO THIS LETTER AGREEMENT, WHETHER SOUNDING IN CONTRACT, TORT OR OTHERWISE.

[SIGNATURE PAGE FOLLOWS]

3

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

GATHERER:

EQM GATHERING OPCO, LLC,

a Delaware limited liability company

By:     /s/ John M. Quinn        

Name: John M. Quinn            

Title:     _VP Business Development & Commercial Services

PRODUCER:

EQT CORPORATION,

a Pennsylvania corporation

By:     /s/ Jeremy Knop        

Name:     Jeremy Knop            

Title:     Chief Financial Officer    

EQT PRODUCTION COMPANY,

a Delaware limited liability company

By:     /s/ J.E.B. Bolen        

Name:     J.E.B. Bolen            

Title:     Vice President Operations Planning

RICE DRILLING B LLC,

a Delaware limited liability company

By:     /s/ J.E.B. Bolen        

Name:     J.E.B. Bolen            

Title:     Vice President Operations Planning

EQT ENERGY, LLC,

a Delaware limited liability company

By:     /s/ Keith Shoemaker        

Name:     Keith Shoemaker        

Title:     SVP Commercial        

EXHIBIT A

[***] System AMI

[***]

EX-31.1

Exhibit 31.1

CERTIFICATION

I, Thomas F. Karam, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Equitrans Midstream Corporation;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:  October 31, 2023

/s/ Thomas F. Karam

Thomas F. Karam

Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION

I, Kirk R. Oliver, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Equitrans Midstream Corporation;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: October 31, 2023

/s/ Kirk R. Oliver

Kirk R. Oliver

Senior Vice President and Chief Financial Officer

EX-32

Exhibit 32

CERTIFICATION

In connection with the QuarterlyReport of Equitrans Midstream Corporation on Form 10-Q for the period ended September 30, 2023, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned certify pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that:

(1)    The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)    The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of Equitrans Midstream Corporation.

/s/ Thomas F. Karam	October 31, 2023
Thomas F. Karam Chief Executive Officer
/s/ Kirk R. Oliver	October 31, 2023
Kirk R. Oliver Senior Vice President and Chief Financial Officer

XML

Cover - shares shares in Thousands	9 Months Ended
	Sep. 30, 2023	Oct. 30, 2023
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2023
Document Transition Report	false
Entity File Number	001-38629
Entity Registrant Name	EQUITRANS MIDSTREAM CORPORATION
Entity Incorporation, State or Country Code	PA
Entity Tax Identification Number	83-0516635
Entity Address, Address Line One	2200 Energy Drive
Entity Address, City or Town	Canonsburg
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	15317
City Area Code	724
Local Phone Number	271-7600
Title of 12(b) Security	Common Stock, no par value
Trading Symbol	ETRN
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Small Business Entity	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		433,261
Entity Central Index Key	0001747009
Amendment Flag	false
Current Fiscal Year End	--12-31
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q3

XML

Statements of Consolidated Comprehensive Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended			9 Months Ended
		Sep. 30, 2023	Sep. 30, 2022	[1]	Sep. 30, 2023		Sep. 30, 2022	[1]
Income Statement [Abstract]
Operating revenues		$ 338,514	$ 331,751		$ 1,033,320		$ 1,002,508
Operating expenses:
Operating and maintenance		43,046	35,297		131,675		100,820
Selling, general and administrative		55,627	33,348		145,181		92,074
Depreciation		69,348	68,572		208,783		203,272	[2]
Amortization of intangible assets		16,204	16,204		48,614		48,614	[2]
Total operating expenses		184,225	153,421		534,253		444,780
Operating income		154,289	178,330		499,067		557,728
Equity income	[3]	73,810	48		97,618	[4]	91	[2],[4]
Impairment of equity method investment		0	(583,057)		0		(583,057)
Other (expense) income, net		(3,037)	2,465		8,670		8,124
Loss on extinguishment of debt		0	0		0		(24,937)	[2]
Net interest expense		(106,334)	(101,085)		(314,935)		(289,323)
Income (loss) before income taxes		118,728	(503,299)		290,420		(331,374)
Income tax (benefit) expense		(10,976)	(366)		(14,295)		7,927
Net income (loss)		129,704	(502,933)		304,715		(339,301)	[2]
Net income attributable to noncontrolling interest		2,272	2,932		8,356		10,655
Net income (loss) attributable to Equitrans Midstream		127,432	(505,865)		296,359		(349,956)
Preferred dividends		14,628	14,628		43,884		43,884
Net income (loss) attributable to Equitrans Midstream common shareholders		$ 112,804	$ (520,493)		$ 252,475		$ (393,840)
Earnings (loss) per share of common stock attributable to Equitrans Midstream common shareholders - basic (in dollars per share)		$ 0.26	$ (1.20)		$ 0.58		$ (0.91)
Earnings (loss) per share of common stock attributable to Equitrans Midstream common shareholders - diluted (in dollars per share)		$ 0.26	$ (1.20)		$ 0.58		$ (0.91)
Weighted average common shares outstanding - basic (in shares)		434,080	433,348		433,917		433,333
Weighted average common shares outstanding - diluted (in shares)		439,034	433,348		435,658		433,333
Statement of comprehensive income (loss):
Net income (loss)		$ 129,704	$ (502,933)		$ 304,715		$ (339,301)	[2]
Other comprehensive income, net of tax:
Pension and other post-retirement benefits liability adjustment, net of tax expense of $7, $10, $21 and $34		22	36		66		104
Other comprehensive income		22	36		66		104
Comprehensive income (loss)		129,726	(502,897)		304,781		(339,197)
Less: Comprehensive income attributable to noncontrolling interest		2,272	2,932		8,356		10,655
Less: Comprehensive income attributable to preferred dividends		14,628	14,628		43,884		43,884
Comprehensive income (loss) attributable to Equitrans Midstream common shareholders		$ 112,826	$ (520,457)		$ 252,541		$ (393,736)
Dividends declared per common share (in dollars per share)		$ 0.15	$ 0.15		$ 0.45		$ 0.45

[1] Certain line items of the previously issued unaudited interim consolidated financial statements for the three and nine months ended September 30, 2022 have been revised. See Note 1 for more information.

[2] Certain line items of the previously issued unaudited interim consolidated financial statements for the nine months ended September 30, 2022 have been revised. See Note 1 for more information.

[3] Represents equity income from Mountain Valley Pipeline, LLC (the MVP Joint Venture). See Note 4.

[4] Represents equity income from the MVP Joint Venture. See Note 4.

XML

Statements of Consolidated Comprehensive Income (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Statement [Abstract]
Pension and other post-retirement benefits liability adjustments, net of tax expense	$ 7	$ 7	$ 7	$ 10	$ 12	$ 12	$ 21	$ 34

XML

Statements of Consolidated Cash Flows (Unaudited) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2023	Sep. 30, 2022	[1]
Cash flows from operating activities:
Net income		$ 304,715	$ (339,301)	[2]
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation		208,783	203,272	[2]
Amortization of intangible assets		48,614	48,614	[2]
Provision for credit losses on accounts receivable and contract asset write-down		10,234	0
Deferred income tax (benefit) expense		(20,832)	7,392
Impairment of equity method investment		0	583,057
Equity income	[3],[4]	(97,618)	(91)	[2]
Other income, net		(8,169)	(8,391)
Loss on extinguishment of debt		0	24,937	[2]
Non-cash long-term compensation expense		33,423	12,142
Changes in other assets and liabilities:
Accounts receivable		37,050	34,921
Accounts payable		(7,932)	2,255
Accrued interest		(44,310)	(57,375)
Deferred revenue		240,414	261,013
Other assets and other liabilities		20,488	(25,906)
Net cash provided by operating activities		724,860	746,539
Cash flows from investing activities:
Capital expenditures		(279,463)	(276,828)
Capital contributions to the MVP Joint Venture		(280,471)	(158,178)
Proceeds from sale of gathering assets		0	3,719
Principal payments received on the Preferred Interest		4,347	4,110
Net cash used in investing activities		(555,587)	(427,177)
Cash flows from financing activities:
Proceeds from revolving credit facility borrowings		627,000	284,500
Payments on revolving credit facility borrowings		(322,000)	(394,500)
Proceeds from the issuance of long-term debt		0	1,000,000
Debt discounts, debt issuance costs and credit facility arrangement fees		(60)	(19,880)
Payment for retirement of long-term debt		(98,941)	(1,021,459)
Dividends paid to holders of Equitrans Midstream Preferred Shares		(43,884)	(43,884)
Dividends paid to common shareholders		(194,930)	(194,733)
Distributions paid to noncontrolling interest		(22,440)	(16,000)
Other items		(1,307)	0
Net cash used in financing activities		(56,562)	(405,956)
Net change in cash and cash equivalents		112,711	(86,594)
Cash and cash equivalents at beginning of period		67,898	134,661
Cash and cash equivalents at end of period		180,609	48,067
Cash paid during the period for:
Interest, net of amount capitalized		354,962	339,285
Income taxes, net		$ 4,505	$ 1,243

[1] Certain line items of the previously issued unaudited interim consolidated financial statements for the nine months ended September 30, 2022 have been revised. See Note 1 for more information.

[2] Certain line items of the previously issued unaudited interim consolidated financial statements for the three and nine months ended September 30, 2022 have been revised. See Note 1 for more information.

[3] Represents equity income from Mountain Valley Pipeline, LLC (the MVP Joint Venture). See Note 4.

[4] Represents equity income from the MVP Joint Venture. See Note 4.

XML

Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands		Sep. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents		$ 180,609	$ 67,898
Accounts receivable (net of allowance for credit losses of $5,465 and $3,031 as of September 30, 2023 and December 31, 2022, respectively)		240,006	246,887
Other current assets		67,210	74,917
Total current assets		487,825	389,702
Property, plant and equipment		9,633,507	9,365,051
Less: accumulated depreciation		(1,684,025)	(1,480,720)
Net property, plant and equipment		7,949,482	7,884,331
Investments in unconsolidated entities	[1]	1,290,996	819,743
Goodwill		486,698	486,698
Net intangible assets		538,338	586,952
Other assets		279,318	278,159
Total assets		11,032,657	10,445,585
Current liabilities:
Current portion of long-term debt		299,616	98,830
Accounts payable		53,998	60,528
Capital contributions payable to the MVP Joint Venture		126,564	34,355
Accrued interest		91,452	135,762
Accrued liabilities		79,300	83,835
Total current liabilities		650,930	413,310
Long-term liabilities:
Revolving credit facility borrowings		840,000	535,000
Long-term debt		6,044,044	6,335,320
Contract liability		1,211,919	968,535
Regulatory and other long-term liabilities		131,370	112,974
Total liabilities		8,878,263	8,365,139
Mezzanine equity:
Equitrans Midstream Preferred Shares, 30,018 shares issued and outstanding as of September 30, 2023 and December 31, 2022		681,842	681,842
Shareholders' equity:
Common stock, no par value, 433,261 and 432,781 shares issued and outstanding as of September 30, 2023 and December 31, 2022, respectively		4,009,368	3,974,127
Retained deficit		(3,000,865)	(3,053,590)
Accumulated other comprehensive loss		(1,266)	(1,332)
Total common shareholders' equity		1,007,237	919,205
Noncontrolling interest		465,315	479,399
Total shareholders' equity		1,472,552	1,398,604
Total liabilities, mezzanine equity and shareholders' equity		$ 11,032,657	$ 10,445,585

[1] Represents investment in the MVP Joint Venture. See Note 4.

XML

Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Accounts receivable, allowance for credit losses	$ 5,465	$ 3,031
Mezzanine equity, preferred shares issued (in shares)	30,018	30,018
Mezzanine equity, preferred shares outstanding (in shares)	30,018	30,018
Common stock, shares issued (in shares)	433,261	432,781
Common stock, shares outstanding (in shares)	433,261	432,781

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Statements of Consolidated Shareholders' Equity and Mezzanine Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands		Total		Common Stock		Retained Deficit		Accumulated Other Comprehensive Loss	Noncontrolling Interests
Beginning balance (in shares) at Dec. 31, 2021				432,522
Beginning balance at Dec. 31, 2021		$ 1,972,486	[1]	$ 3,955,918	[1]	$ (2,464,573)	[1]	$ (2,054)	$ 483,195
Increase (Decrease) in Partners' Capital
Net (loss) income		84,265	[1]			80,490	[1]		3,775
Pension and other post-retirement benefits liability adjustment, net of tax expense		34	[1]					34
Dividends on common shares	[1]	(65,584)				(65,584)
Share-based compensation plans, net (in shares)				155
Share-based compensation plans, net	[1]	4,670		$ 4,670
Ending balance (in shares) at Mar. 31, 2022				432,677
Ending balance at Mar. 31, 2022		1,995,871	[1]	$ 3,960,588	[1]	(2,449,667)	[1]	(2,020)	486,970
Mezzanine Equity, beginning balance at Dec. 31, 2021		681,842
Mezzanine Equity
Mezzanine Equity, Net (loss) income		14,628
Dividends paid to holders of Equitrans Midstream Preferred Shares		(14,628)
Mezzanine Equity, ending balance at Mar. 31, 2022		681,842
Increase (Decrease) in Partners' Capital
Net (loss) income		50,111	[1]			46,163	[1]		3,948
Pension and other post-retirement benefits liability adjustment, net of tax expense		34	[1]					34
Dividends on common shares	[1]	(64,991)				(64,991)
Share-based compensation plans, net (in shares)				104
Share-based compensation plans, net	[1]	4,470		$ 4,470
Ending balance (in shares) at Jun. 30, 2022				432,781
Ending balance at Jun. 30, 2022		1,985,495	[1]	$ 3,965,058	[1]	(2,468,495)	[1]	(1,986)	490,918
Mezzanine Equity
Mezzanine Equity, Net (loss) income		14,628
Dividends paid to holders of Equitrans Midstream Preferred Shares		(14,628)
Mezzanine Equity, ending balance at Jun. 30, 2022		681,842
Increase (Decrease) in Partners' Capital
Net (loss) income		(517,561)	[1]			(520,493)	[1]		2,932
Pension and other post-retirement benefits liability adjustment, net of tax expense		36	[1]					36
Dividends on common shares	[1]	(65,681)				(65,681)
Share-based compensation plans, net	[1]	4,533		$ 4,533
Distributions paid to noncontrolling interest in Eureka Midstream Holdings, LLC		(16,000)	[1]						(16,000)
Ending balance (in shares) at Sep. 30, 2022				432,781
Ending balance at Sep. 30, 2022		1,390,822	[1]	$ 3,969,591	[1]	(3,054,669)	[1]	(1,950)	477,850
Mezzanine Equity
Mezzanine Equity, Net (loss) income		14,628
Dividends paid to holders of Equitrans Midstream Preferred Shares		(14,628)
Mezzanine Equity, ending balance at Sep. 30, 2022		$ 681,842
Beginning balance (in shares) at Dec. 31, 2022		432,781		432,781
Beginning balance at Dec. 31, 2022		$ 1,398,604		$ 3,974,127		(3,053,590)		(1,332)	479,399
Increase (Decrease) in Partners' Capital
Net (loss) income		91,463				87,054			4,409
Pension and other post-retirement benefits liability adjustment, net of tax expense		22						22
Dividends on common shares		(65,121)				(65,121)
Share-based compensation plans, net (in shares)				402
Share-based compensation plans, net		3,050		$ 3,050
Distributions paid to noncontrolling interest in Eureka Midstream Holdings, LLC		(8,000)							(8,000)
Ending balance (in shares) at Mar. 31, 2023				433,183
Ending balance at Mar. 31, 2023		1,420,018		$ 3,977,177		(3,031,657)		(1,310)	475,808
Mezzanine Equity, beginning balance at Dec. 31, 2022		681,842
Mezzanine Equity
Mezzanine Equity, Net (loss) income		14,628
Dividends paid to holders of Equitrans Midstream Preferred Shares		(14,628)
Mezzanine Equity, ending balance at Mar. 31, 2023		681,842
Increase (Decrease) in Partners' Capital
Net (loss) income		54,292				52,617			1,675
Pension and other post-retirement benefits liability adjustment, net of tax expense		22						22
Dividends on common shares		(68,227)				(68,227)
Share-based compensation plans, net (in shares)				78
Share-based compensation plans, net		23,853		$ 23,853
Distributions paid to noncontrolling interest in Eureka Midstream Holdings, LLC		(12,000)							(12,000)
Ending balance (in shares) at Jun. 30, 2023				433,261
Ending balance at Jun. 30, 2023		1,417,958		$ 4,001,030		(3,047,267)		(1,288)	465,483
Mezzanine Equity
Mezzanine Equity, Net (loss) income		14,628
Dividends paid to holders of Equitrans Midstream Preferred Shares		(14,628)
Mezzanine Equity, ending balance at Jun. 30, 2023		681,842
Increase (Decrease) in Partners' Capital
Net (loss) income		115,076				112,804			2,272
Pension and other post-retirement benefits liability adjustment, net of tax expense		22						22
Dividends on common shares		(66,402)				(66,402)
Share-based compensation plans, net		8,338		$ 8,338
Distributions paid to noncontrolling interest in Eureka Midstream Holdings, LLC		$ (2,440)							(2,440)
Ending balance (in shares) at Sep. 30, 2023		433,261		433,261
Ending balance at Sep. 30, 2023		$ 1,472,552		$ 4,009,368		$ (3,000,865)		$ (1,266)	$ 465,315
Mezzanine Equity
Mezzanine Equity, Net (loss) income		14,628
Dividends paid to holders of Equitrans Midstream Preferred Shares		(14,628)
Mezzanine Equity, ending balance at Sep. 30, 2023		$ 681,842

[1] Certain line items of the previously issued unaudited interim consolidated financial statements for the three and nine months ended September 30, 2022 have been revised. See Note 1 for more information.

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Statements of Consolidated Shareholders' Equity and Mezzanine Equity (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022
Pension and other post-retirement benefits liability adjustments, net of tax expense	$ 7	$ 7	$ 7	$ 10	$ 12	$ 12
Dividends on common shares (in dollars per share)	$ 0.15	$ 0.15	$ 0.15	$ 0.15	$ 0.15	$ 0.15
EQM Midstream Partners, LP
Dividends paid to holders of Equitrans Midstream Preferred Shares (in dollars per share)	$ 0.4873	$ 0.4873	$ 0.4873	$ 0.4873	$ 0.4873	$ 0.4873

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Financial Statements

9 Months Ended

Sep. 30, 2023

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Financial Statements

Financial Statements

Nature of Business. The Company's operating subsidiaries provide midstream services to the Company's customers in Pennsylvania, West Virginia and Ohio through three primary assets: the gathering system, which includes predominantly dry gas gathering systems of high-pressure gathering lines; the transmission system, which includes FERC-regulated interstate pipelines and storage systems; and the water network, which primarily consists of water pipelines and other facilities that support well completion activities and produced water handling activities.

Basis of Presentation. References in these financial statements to Equitrans Midstream or the Company refer collectively to Equitrans Midstream Corporation and its consolidated subsidiaries for all periods presented, unless otherwise indicated.

The accompanying unaudited consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States (GAAP) for interim financial information and with the requirements of Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, these unaudited consolidated financial statements include all adjustments (consisting of only normal, recurring adjustments, unless otherwise disclosed in this Quarterly Report on Form 10-Q) necessary for a fair presentation of the financial position of the Company as of September 30, 2023, the results of its operations and equity for the three and nine months ended September 30, 2023 and 2022 and its cash flows for the nine months ended September 30, 2023 and 2022. The consolidated balance sheet at December 31, 2022 has been derived from the audited financial statements at that date, but does not include all of the information and notes required by GAAP for complete financial statements. This Quarterly Report on Form 10-Q should be read in conjunction with the Company's Annual Report on Form 10-K for the year ended December 31, 2022, which includes all disclosures required by GAAP.

Due to, among other things, the seasonal nature of the Company's utility customer contracts, as well as producers’ well completion activities and varying needs for fresh and produced water (which are primarily driven by horizontal lateral lengths and the number of completion stages per well), the interim statements for the three and nine months ended September 30, 2023 are not necessarily indicative of the results that may be expected for the year ending December 31, 2023.

For further information, refer to the Company's consolidated financial statements and related notes in the Company's Annual Report on Form 10-K for the year ended December 31, 2022, as well as Part I, "Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations" contained herein.

Revisions of Previously Issued Financial Statements.

In the course of its 2022 year-end process, the Company identified certain corrections in its previously issued unaudited interim consolidated financial statements primarily related to the accounting for the Henry Hub cash bonus payment provision (as defined in Note 7). In accordance with Staff Accounting Bulletin (SAB) No. 99, Materiality, and SAB No. 108, Considering the Effects of Prior Year Misstatements when Quantifying Misstatements in Current Year Financial Statements, the Company evaluated the corrections and, based on its analysis of quantitative and qualitative factors, determined that the related impact was not material to the Company's affected unaudited interim consolidated financial statements presented within this Quarterly Report on Form 10-Q. The Company has made the appropriate revisions to its previously issued interim consolidated financial statements in order to correct the Henry Hub cash bonus payment provision, and also made other immaterial revisions to its nine months ended September 30, 2022 unaudited interim consolidated financial statements. For more information, see Notes 1 and 16 to the consolidated financial statements in the Company's Annual Report on Form 10-K for the year ended December 31, 2022.

Recently Issued Accounting Standards.

In March 2020, the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848), which provides practical expedients for contract modifications and certain hedging relationships associated with the transition from reference rates that are expected to be discontinued. This guidance is applicable to the calculation of each dividend following March 31, 2024 for the Equitrans Midstream Preferred Shares pursuant to the Company's Second Amended and Restated Articles of Incorporation, as well as any Company contracts that use the London Inter-Bank Offered Rate as a reference rate. In December 2022, the FASB also issued ASU 2022-06, which amended Topic 848 to defer the sunset date to apply the practical expedients until December 31, 2024. The Company adopted this standard on April 1, 2023 and it had no impact on the Company's financial statements and related disclosures.

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Financial Information by Business Segment

9 Months Ended

Sep. 30, 2023

Segment Reporting [Abstract]

Financial Information by Business Segment

Financial Information by Business Segment

The Company reports its operations in three segments that reflect its three lines of business of Gathering, Transmission and Water, which reflects the manner in which management evaluates the business for making operating decisions and assessing performance.

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
	(Thousands)
Revenues from customers:
Gathering	$	220,087	$	227,180	$	641,033	$	672,284
Transmission	98,575		91,557		330,021		293,430
Water	19,852		13,014		62,266		36,794
Total operating revenues	$	338,514	$	331,751	$	1,033,320	$	1,002,508
Operating income (loss):
Gathering	$	101,134	$	112,279	$	286,448	$	345,695
Transmission	55,808		64,077		203,181		209,480
Water	(2,251)		2,342		10,652		3,537
Headquarters (a)	(402)		(368)		(1,214)		(984)
Total operating income	$	154,289	$	178,330	$	499,067	$	557,728
Reconciliation of operating income to net income (loss):
Equity income (b)	$	73,810	$	48	$	97,618	$	91
Impairment of equity method investment (b)	—		(583,057)		—		(583,057)
Other (expense) income, net (c)	(3,037)		2,465		8,670		8,124
Loss on extinguishment of debt	—		—		—		(24,937)
Net interest expense	(106,334)		(101,085)		(314,935)		(289,323)
Income tax (benefit) expense	(10,976)		(366)		(14,295)		7,927
Net income (loss)	$	129,704	$	(502,933)	$	304,715	$	(339,301)

(a)Includes certain unallocated corporate expenses.

(b)Equity income and impairment of equity method investment are included in the Transmission segment.

(c)Includes unrealized (loss) gain on derivative instruments recorded in the Gathering segment.

	September 30, 2023		December 31, 2022
	(Thousands)
Segment assets:
Gathering	$	7,605,477	$	7,610,233
Transmission (a)	2,808,259		2,333,896
Water	209,967		218,680
Total operating segments	10,623,703		10,162,809
Headquarters, including cash	408,954		282,776
Total assets	$	11,032,657	$	10,445,585

(a)The equity method investment in the MVP Joint Venture is included in the Transmission segment.

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
	(Thousands)
Depreciation:
Gathering	$	48,585	$	49,125	$	147,321	$	145,953
Transmission	14,004		13,909		41,796		41,707
Water	6,655		5,162		19,029		14,483
Headquarters	104		376		637		1,129
Total	$	69,348	$	68,572	$	208,783	$	203,272
Capital expenditures:
Gathering (a)	$	67,551	$	73,589	$	199,157	$	195,925
Transmission (b)	31,332		12,429		54,896		22,994
Water	9,574		17,041		31,798		49,132
Headquarters	—		—		—		13
Total (c)	$	108,457	$	103,059	$	285,851	$	268,064

(a)Includes capital expenditures related to the noncontrolling interest in Eureka Midstream Holdings, LLC (Eureka Midstream) of approximately $3.3 million and $11.5 million for the three and nine months ended September 30, 2023, respectively, and approximately $5.9 million and $17.6 million for the three and nine months ended September 30, 2022, respectively.

(b)Transmission capital expenditures do not include aggregate capital contributions made to the MVP Joint Venture for the MVP and MVP Southgate projects of approximately $209.9 million and $280.5 million for the three and nine months ended September 30, 2023, respectively, and approximately $46.4 million and $158.2 million for the three and nine months ended September 30, 2022, respectively.

(c)The Company accrues capital expenditures when the work has been completed but the associated bills have not yet been paid. Accrued capital expenditures are excluded from the statements of consolidated cash flows until they are paid. The net impact of non-cash capital expenditures, including the effect of accrued capital expenditures, transfers to/from inventory as assets are completed/assigned to a project and capitalized share-based compensation costs were $(0.9) million and $(6.4) million for the three and nine months ended September 30, 2023, respectively, and $10.7 million and $8.8 million for the three and nine months ended September 30, 2022, respectively.

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Revenue from Contracts with Customers

9 Months Ended

Sep. 30, 2023

Revenue from Contract with Customer [Abstract]

Revenue from Contracts with Customers

Revenue from Contracts with Customers

For the three and nine months ended September 30, 2023 and 2022, substantially all revenues recognized on the Company's statements of consolidated comprehensive income were from contracts with customers. As of September 30, 2023 and December 31, 2022, all receivables recorded on the Company's consolidated balance sheets represented performance obligations that have been satisfied and for which an unconditional right to consideration exists.

Summary of disaggregated revenues. The tables below provide disaggregated revenue information by business segment.

	Three Months Ended September 30, 2023
	Gathering		Transmission		Water		Total
	(Thousands)
Firm reservation fee revenues (a)	$	147,137	$	82,508	$	11,029	$	240,674
Volumetric-based fee revenues	72,950		16,067		8,823		97,840
Total operating revenues	$	220,087	$	98,575	$	19,852	$	338,514
	Three Months Ended September 30, 2022
	Gathering		Transmission		Water		Total
	(Thousands)
Firm reservation fee revenues (a)	$	144,730	$	84,584	$	9,375	$	238,689
Volumetric-based fee revenues	82,450		6,973		3,639		93,062
Total operating revenues	$	227,180	$	91,557	$	13,014	$	331,751

	Nine Months Ended September 30, 2023
	Gathering		Transmission		Water		Total
	(Thousands)
Firm reservation fee revenues (a)	$	428,945	$	266,477	$	29,793	$	725,215
Volumetric-based fee revenues (b)	212,088		63,544		32,473		308,105
Total operating revenues	$	641,033	$	330,021	$	62,266	$	1,033,320
	Nine Months Ended September 30, 2022
	Gathering		Transmission		Water		Total
	(Thousands)
Firm reservation fee revenues (a)	$	415,932	$	272,129	$	24,502	$	712,563
Volumetric-based fee revenues	256,352		21,301		12,292		289,945
Total operating revenues	$	672,284	$	293,430	$	36,794	$	1,002,508

(a) Firm reservation fee revenues associated with Gathering included MVC unbilled revenues of approximately $1.8 million and $7.5 million for the three and nine months ended September 30, 2023, respectively, and $8.5 million and $17.4 million for the three and nine months ended September 30, 2022, respectively.

(b) For the nine months ended September 30, 2023, volumetric-based fee revenues associated with Gathering and Transmission included one-time contract buyouts by a customer for approximately $5.0 million and $23.8 million, respectively.

Contract assets. The Company's contract assets related to the Company's future MVC deficiency payments are generally expected to be collected within the next twelve months and are primarily included in other current assets in the Company's consolidated balance sheets until such time as the MVC deficiency payments are invoiced to the customer.

The following table presents changes in the Company's unbilled revenue balance:

	Nine Months Ended September 30,
	2023		2022
	(Thousands)
Balance as of beginning of period	$	27,493	$	16,772
Revenue recognized in excess of amounts invoiced (a)	7,530		19,436
Minimum volume commitments invoiced (b)	(23,558)		(14,884)
Amortization (c)	(494)		(334)
Balance as of end of period	$	10,971	$	20,990

(a)Primarily includes revenues associated with MVCs that are generally included in firm reservation fee revenues within the Gathering and Water segments.

(b)Unbilled revenues are transferred to accounts receivable once the Company has an unconditional right to consideration from the customer.

(c)Amortization of capitalized contract costs paid to customers over the expected life of the agreement.

Contract liabilities. The Company's contract liabilities consist of deferred revenue primarily associated with the EQT Global GGA. Contract liabilities are classified as current or non-current according to when such amounts are expected to be recognized.

On July 8, 2022, the Company received written notice from EQT, pursuant to the EQT Global GGA, of EQT’s irrevocable election under the agreement to forgo up to approximately $145 million of potential gathering fee relief in the first twelve-month period beginning the first day of the quarter in which the MVP full in-service date occurs and up to approximately $90 million of potential gathering fee relief in the second such twelve-month period in exchange for a cash payment from the Company to EQT in the amount of approximately $195.8 million (the EQT Cash Option). As a result of EQT’s election to forgo potential rate relief in exchange for the cash option payment, the Company recorded a reduction to the contract liability of approximately $195.8 million and an increase to the EQT Cash Option liability on the consolidated balance sheets as of September 30, 2022. The Company utilized borrowings under the Amended EQM Credit Facility to effect such payment and the payment was made to EQT on October 4, 2022.

The following table presents changes in the Company's contract liability balances:

	Nine Months Ended September 30,
	2023		2022
	(Thousands)
Balance as of beginning of period	$	973,087	$	822,416
Amounts recorded during the period (a)	250,061		266,792
Change in estimated variable consideration (b)	(5,330)		(4,837)
Amounts transferred during the period (c)	(4,317)		(942)
EQT Cash Option	—		(195,820)
Balance as of end of period	$	1,213,501	$	887,609

(a)Includes deferred billed revenue during the nine months ended September 30, 2023 and 2022 primarily associated with the EQT Global GGA.

(b)For the nine months ended September 30, 2023, the change in estimated variable consideration represents the decrease in total deferred revenue due to changes in MVP timing assumptions. For the nine months ended September 30, 2022, the change in estimated variable consideration represents the decrease in total deferred revenue required for gathering MVC revenue with a declining rate structure, resulting from the EQT Cash Option election that required total estimated gathering consideration to be increased.

(c)Deferred revenues are recognized as revenue upon satisfaction of the Company's performance obligation to the customer.

Summary of remaining performance obligations. The following table summarizes the estimated transaction price allocated to the Company's remaining performance obligations under all contracts with firm reservation fees, MVCs and/or ARCs as of September 30, 2023 that the Company will invoice or transfer from contract liabilities and recognize in future periods.

		2023(a)		2024		2025		2026		2027		Thereafter		Total
	(Thousands)
Gathering firm reservation fees		$	25,390	$	156,078	$	177,127	$	167,692	$	161,018	$	1,726,068	$	2,413,373
Gathering revenues supported by MVCs		114,809		427,169		456,995		489,335		487,366		3,169,121		5,144,795
Transmission firm reservation fees		94,184		394,879		394,766		393,300		394,490		3,149,178		4,820,797
Water revenues supported by ARCs		9,375		45,706		48,441		45,159		44,065		166,644		359,390
Total (b)		$	243,758	$	1,023,832	$	1,077,329	$	1,095,486	$	1,086,939	$	8,211,011	$	12,738,355

(a)    October 1, 2023 through December 31, 2023.

(b)    Includes assumptions regarding timing for placing certain projects in-service. Such assumptions may not be realized and delays in the in-service dates for projects have substantially altered, and any future additional delays may further substantially alter, the remaining performance obligations for certain contracts with firm reservation fees, MVCs and/or ARCs. The MVP Joint Venture is accounted for as an equity method investment and those amounts are not included in the table above.

Based on total projected contractual revenues, including projected contractual revenues from future capacity expected from expansion projects that are not yet fully constructed or not yet fully in-service for which the Company has executed firm contracts, the Company's firm gathering contracts and firm transmission and storage contracts had weighted average remaining terms of approximately 13 years and 11 years, respectively, as of September 30, 2023.

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Investment in Unconsolidated Entities

9 Months Ended

Sep. 30, 2023

Equity Method Investments and Joint Ventures [Abstract]

Investment in Unconsolidated Entities

Investment in Unconsolidated EntitiesMountain Valley Pipeline. The MVP Joint Venture is constructing the Mountain Valley Pipeline (MVP), an estimated 300-mile natural gas interstate pipeline that is designed to span from northern West Virginia to southern Virginia. The Company will operate the MVP and owned a 47.7% interest in the MVP project as of September 30, 2023. On November 4, 2019, Consolidated Edison, Inc. (Con Edison) exercised an option to cap its investment in the construction of the MVP project at approximately $530 million (excluding AFUDC). On May 4, 2023, RGC Resources, Inc. (RGC) also exercised an option for the Company to fund RGC's portion of future capital contributions with respect to the MVP project, which funding the Company commenced in June 2023 and will continue through the full in-service date of the MVP. The Company and NextEra Energy, Inc. are obligated to, and RGC prior to the exercise of its option described above had opted to, fund the shortfall in Con Edison's capital contributions, on a pro rata basis. Following RGC's exercise of its option, the Company is also funding RGC's portion of Con Edison's shortfall. Such funding by the Company in respect of the Con Edison shortfall and RGC's portion of capital contributions has and will correspondingly increase the Company's interests in the MVP project and decrease Con Edison's and RGC's respective interests, as applicable, in the MVP project.

On June 3, 2023, the President of the United States signed into law the Fiscal Responsibility Act of 2023 that, among other things, ratified and approved all permits and authorizations necessary for the construction and initial operation of the MVP, directed the applicable federal officials and agencies to maintain such authorizations, required the Secretary of the Army to issue not later than June 24, 2023 all permits or verifications necessary to complete construction of the MVP and allow for the MVP’s operation and maintenance, and divested courts of jurisdiction to review agency actions on approvals necessary for MVP construction and initial operation. Following enactment of the Fiscal Responsibility Act of 2023, the Fourth Circuit issued a stay halting MVP project construction in the Jefferson National Forest and a stay of the new Biological Opinion and Incidental Take Statement for the MVP project effectively halting forward construction for the entirety of the project, on July 10, 2023 and July 11, 2023, respectively. The MVP Joint Venture subsequently filed an emergency application to vacate the stays with the U.S. Supreme Court and the U.S. Supreme Court vacated the stays on July 27, 2023. Accordingly, the MVP Joint Venture recommenced forward construction.

On October 18, 2023, the Company announced that following the MVP Joint Venture's comprehensive review of progress achieved since the resumption of forward construction in August 2023 and construction activity remaining for completion of the MVP project, the MVP Joint Venture refined the targeted timing for completing construction of the project from year-end 2023 to the first quarter of 2024, with the total project cost anticipated to be approximately $7.2 billion (excluding AFUDC), which includes approximately $120 million of contingency. Based on such targeted completion timing and following in-service authorization from the FERC, contractual obligations accordingly would commence on or before April 1, 2024. If the project were to be completed in the first quarter of 2024 and at a total project cost of approximately $7.2 billion (excluding AFUDC), the Company expects its equity ownership in the MVP project would progressively increase from approximately 47.7% to approximately 48.8%.

The MVP Joint Venture is a variable interest entity because it has insufficient equity to finance its activities during the construction stage of the project. The Company is not the primary beneficiary of the MVP Joint Venture because the Company does not have the power to direct the activities that most significantly affect the MVP Joint Venture's economic performance. Certain business decisions, such as decisions to make distributions of cash, require a greater than 66 2/3% ownership interest approval, and no one member owns more than a 66 2/3% interest.

The Company reviews the carrying value of its investments in unconsolidated entities for impairment whenever events or changes in circumstances indicate that the fair value may have declined in value. In connection with its assessment as of September 30, 2022, the Company identified an increased risk of one or more permitting delays resulting primarily from then recent legal developments and regulatory uncertainties, as well as macroeconomic pressures primarily due to increased interest rates that impacted the discount rate used within the estimated fair value of its investment in the MVP Joint Venture. The Company considered these factors to be indicators of a decline in value. As such, the Company evaluated if the carrying value of its equity method investment in the MVP Joint Venture as of September 30, 2022 exceeded the fair value and, if so, whether that decline in value was other-than-temporary.

The Company estimated the fair value of its investment in the MVP Joint Venture using an income approach that primarily considered revised probability-weighted scenarios of discounted future net cash flows based on the estimates of total project costs and revenues. These scenarios reflected assumptions and judgments regarding potential delays and cost increases resulting from various then ongoing legal and regulatory matters affecting the MVP and MVP Southgate projects. The Company’s analysis also took into account, among other things, probability-weighted growth expectations from additional compression expansion opportunities. The Company generally used an after-tax discount rate of 7.5% in the analysis derived based on a market participant approach. The Company considered scenarios under which then ongoing or new legal and regulatory matters could further delay the completion and increase the total costs of the project; all required legal and regulatory approvals and authorizations and certain compression expansion opportunities are realized; and the MVP project is canceled. As a result of the assessment, the Company recognized a pre-tax impairment charge of approximately $583 million that reduced the carrying value of its equity investment in the MVP Joint Venture to approximately $784 million as of September 30, 2022. Given the significant assumptions and judgments used in estimating the fair value of the Company's investment in the MVP Joint Venture, the fair value of the investment in the MVP Joint Venture represented a Level 3 measurement.

In September 2023, the MVP Joint Venture issued a capital call notice for the funding of the MVP project to MVP Holdco, LLC (MVP Holdco), a wholly owned subsidiary of the Company, for $126.3 million, which was paid in October 2023. In October 2023, the MVP Joint Venture issued a capital call notice for the funding of the MVP project to MVP Holdco for $327.0 million, which is expected to be paid in the fourth quarter of 2023.

Pursuant to the MVP Joint Venture's limited liability company agreement, MVP Holdco is obligated to provide performance assurances in respect of the MVP project, which may take the form of a guarantee from EQM (provided that EQM's debt is rated as investment grade in accordance with the requirements of the MVP Joint Venture's limited liability company agreement), a letter of credit or cash collateral, in favor of the MVP Joint Venture to provide assurance as to the funding of

MVP Holdco's proportionate share of the construction budget for the MVP project. As of September 30, 2023, the letter of credit with respect to the MVP project was in the amount of approximately $219.7 million. The letter of credit with respect to the MVP project is expected to continue to reduce over time as the Company contributes capital to fund MVP Holdco's remaining proportionate share of the construction budget.

The Company's ownership interest in the MVP Joint Venture related to the MVP project is significant for the nine months ended September 30, 2023 as defined by the SEC's Regulation S-X Rule 1-02(w). Accordingly, as required by Regulation S-X Rule 3-09, the following tables summarize the unaudited condensed consolidated financial statements of the MVP Joint Venture in relation to the MVP project.

Condensed Balance Sheets

	September 30, 2023		December 31, 2022
	(Thousands)
Current assets	$	250,231	$	71,535
Non-current assets	7,510,768		6,737,064
Total assets	$	7,760,999	$	6,808,599
Current liabilities	$	236,947	$	118,679
Equity	7,524,052		6,689,920
Total liabilities and equity	$	7,760,999	$	6,808,599

Condensed Statements of Operations

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
	(Thousands)
Operating (expense) income	$	—	$	(20)	$	—	$	20
Other income	1,368		—		1,930		—
Net interest income	46,191		120		61,114		172
AFUDC - equity	107,785		—		142,607		—
Net income	$	155,344	$	100	$	205,651	$	192

MVP Southgate Project. In April 2018, the MVP Joint Venture announced the MVP Southgate project, which is a contemplated interstate pipeline that was approved by the FERC to extend approximately 75-miles from the MVP at Pittsylvania County, Virginia to new delivery points in Rockingham and Alamance Counties, North Carolina. The Company is expected to operate the MVP Southgate pipeline and owned a 47.2% interest in the MVP Southgate project as of September 30, 2023. The MVP Joint Venture continues to engage with the project shipper, Dominion Energy North Carolina, and a prospective customer regarding refining the MVP Southgate project’s design, scope and/or timing for the benefit of such customers in lieu of pursuing the project as originally contemplated. Dominion Energy North Carolina’s obligations under the precedent agreement in support of the original project are subject to certain conditions, including, among others, that the MVP Joint Venture will have completed construction of the project facilities by December 31, 2023. The Company is unable to ensure the results of the continued engagement between the MVP Joint Venture and Dominion Energy North Carolina and a prospective customer, including the ultimate design, scope, timing, undertaking or completion of the project.

Pursuant to the MVP Joint Venture's limited liability company agreement, MVP Holdco is obligated to provide performance assurances in respect of MVP Southgate, which performance assurances may take the form of a guarantee from EQM (provided that EQM's debt is rated as investment grade in accordance with the requirements of the MVP Joint Venture's limited liability company agreement), a letter of credit or cash collateral. On April 6, 2023, EQM’s $14.2 million letter of credit with respect to the MVP Southgate project was terminated, following the determination to temporarily defer partners’ obligations to post performance assurances with respect to the MVP Southgate project, which may be reinstated upon further developments. Upon the FERC’s initial release to begin construction of the MVP Southgate project, the Company will be obligated to deliver an allowable form of performance assurance in an amount equal to 33% of MVP Holdco’s proportionate share of the remaining capital obligations under the applicable construction budget.

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Stock-based Compensation Plans

9 Months Ended

Sep. 30, 2023

Share-Based Payment Arrangement [Abstract]

Stock-based Compensation Plans

Share-based Compensation Plans

In December 2021, at the recommendation of the Human Capital and Compensation Committee (the Compensation Committee) and approval of the Company’s Board of Directors (the Board), the Company granted a special, one-time, performance award program designed to reward all employees should the Company’s most complex and strategically significant project, the MVP project, be placed in-service (the MVP PSU Program). The Company granted 1,450,110 shares to all participants in the 2018 Long-Term Incentive Plan, as amended, as of November 1, 2021 (LTIP Participants), except the Company’s named executive officers (NEOs) and certain other senior leaders (collectively, the Senior Executives), and 1,158,030 shares to the Senior Executives. The MVP PSU Program awards were granted on December 6, 2021 and will be paid in Company common stock, contingent on the MVP Joint Venture being authorized by the FERC to commence service on the MVP (such authorization, the In-Service Date) on or before a specified expiration date of January 1, 2024 (the Expiration Date, the continued applicability of which is discussed below), subject to continued service through the applicable payment date:

•As to shares issued to the LTIP Participants, 100% will be paid on the date selected by the Company that is not later than 90 days after the In-Service Date;

•As to shares issued to the Senior Executives:

•50% will be paid on the date selected by the Company that is not later than 90 days after the In-Service Date;

•25% will be paid on the date selected by the Company that is not later than 30 days after the first anniversary of the In-Service Date; and

•25% will be paid on the date selected by the Company that is not later than 30 days after the second anniversary of the In-Service Date.

Dividends are eligible to be paid in cash upon vesting on each share of common stock as dividends are declared on the Company's common stock during the vesting period.

The achievement of the MVP Joint Venture being authorized by the FERC to commence service on the MVP on or before the Expiration Date represented a performance condition as defined by ASC 718, Share-based Compensation, that should be assessed at the end of each reporting period as to whether the performance condition is probable of being achieved. Due to the graded vesting of the MVP PSU Program awards to the Senior Executives, the Company recognizes compensation cost over the requisite service period for each separately vested tranche of the award as though each award was, in substance, its own award. In June 2023, the performance condition associated with the MVP PSU Program awards was deemed to be probable. During the nine months ended September 30, 2023, the Company recognized compensation cost of approximately $19.4 million that includes the cumulative catch-up of approximately $14.1 million to reflect the requisite service period of each award that has been provided to date. As of September 30, 2023, there was approximately $4.9 million of unrecognized compensation cost related to non-vested MVP PSU Program awards that is expected to be recognized over a remaining weighted average vesting term of approximately 0.8 years.

The following table provides detailed information on the MVP PSU Program as of September 30, 2023:

MVP PSU Program	Non-vested Shares	Grant Date Fair Value (a)	Fair Value (Thousands)		Requisite Service Period	Unrecognized Compensation Cost (Thousands)
LTIP Participants	1,367,983	$9.59	$	13,119	28 months	$	1,551
Senior Executives T1	579,015	$9.59	5,553		28 months	666
Senior Executives T2	289,511	$9.59	2,776		40 months	1,126
Senior Executives T3	289,504	$9.59	2,776		52 months	1,530

(a)    Determined based upon the closing price of the Company's common stock on the day before the grant date.

In connection with considering the Company’s ongoing efforts to complete the MVP project, the Board took note of the significant legal and regulatory obstacles that delayed progress on the MVP project that were outside of the control of the Company, particularly since the inception of the MVP PSU Program, the efforts undertaken by many of the Company’s employees, including the NEOs, to overcome these obstacles, and ongoing risks. The Board also is focused on and seeks to promote the Company's top priority of completing the MVP project safely and in compliance with applicable environmental standards. Taking into account these factors, the proximity of the Expiration Date, and noting the potential that the Expiration

Date could distract from, or be cited by project opponents as a distraction from, a focus on safety and environmental compliance, the Board, on July 26, 2023, with the recommendation of the Compensation Committee, approved an amendment to the MVP PSU Program to eliminate the Expiration Date as a term of the MVP PSU Program and all award agreements thereunder (the MVP PSU Amendment).

Accordingly, the Equitrans Midstream Corporation Senior Executive 2021 MVP Performance Share Units Award Agreements to which the NEOs are parties and the Equitrans Midstream Corporation LTIP Participant 2021 MVP Performance Share Units Award Agreements were amended to reflect the elimination of the Expiration Date, and the calculation of shares retained in the event of a participant’s termination due to death, disability or retirement also was clarified. All other terms of the award agreements remain in full force and effect.

The MVP PSU Amendment resulted in a change to the original performance condition of the MVP PSU Program. As such, the Company accounted for the MVP PSU Amendment as a Type Ι modification in accordance with ASC 718, which did not result in any additional compensation cost related to the awards.

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Debt

9 Months Ended

Sep. 30, 2023

Debt Disclosure [Abstract]

Debt

Debt

Amended EQM Credit Facility. As of September 30, 2023, the Company had aggregate commitments available under that certain Third Amended and Restated Credit Agreement, dated as of October 31, 2018 (as amended, supplemented or otherwise modified, the Amended EQM Credit Facility), among EQM, as borrower, Wells Fargo Bank, National Association, as the administrative agent, swing line lender, and an L/C issuer, the lenders party thereto from time to time and any other persons party thereto from time to time, of approximately $2.16 billion before October 31, 2023, with approximately $1.55 billion in aggregate commitments available on and after October 31, 2023 and prior to April 30, 2025. As of September 30, 2023, EQM had approximately $525 million of borrowings and $220.7 million of letters of credit outstanding under the Amended EQM Credit Facility. The amount EQM is able to borrow under the Amended EQM Credit Facility is bounded by a maximum Consolidated Leverage Ratio (as defined in the Amended EQM Credit Facility) that, as of September 30, 2023, could not exceed 5.50 to 1.00. Effective as of October 1, 2023 (the MVP Mobilization Effective Date, as defined in the Amended EQM Credit Facility), the maximum Consolidated Leverage Ratio permitted with respect to the fiscal quarter ending December 31, 2023 and the end of each of EQM’s three consecutive fiscal quarters thereafter is 5.85 to 1.00, with the then-applicable ratio being tested as of the end of each fiscal quarter. As of the MVP Mobilization Effective Date, as defined in the Amended EQM Credit Facility, EQM expects to have the ability to borrow approximately $0.6 billion under the Amended EQM Credit Facility. As of December 31, 2022, EQM had approximately $240 million of borrowings and $234.9 million of letters of credit outstanding under the Amended EQM Credit Facility. For the avoidance of doubt, any reference to the Amended EQM Credit Facility as of any particular date shall mean the Amended EQM Credit Facility as in effect on such date.

During the three and nine months ended September 30, 2023, the maximum outstanding borrowings at any time were approximately $525 million and the average daily balances were approximately $337 million and $263 million, respectively. EQM incurred interest at weighted average annual interest rates of approximately 8.2% and 7.9% for the three and nine months ended September 30, 2023, respectively. For the three and nine months ended September 30, 2023, commitment fees of $2.0 million and $6.4 million, respectively, were paid to maintain credit availability under the Amended EQM Credit Facility. During the three and nine months ended September 30, 2022, the maximum outstanding borrowings at any time were approximately $190 million and $280 million, respectively, and the average daily balances were approximately $143 million and $176 million, respectively. EQM incurred interest at weighted average annual interest rates of approximately 4.8% and 3.8% for the three and nine months ended September 30, 2022, respectively. For the three and nine months ended September 30, 2022, commitment fees of $2.3 million and $6.1 million, respectively, were paid to maintain credit availability under the Amended EQM Credit Facility. As of September 30, 2023, no term loans were outstanding under the Amended EQM Credit Facility.

See Note 10 for a discussion of the Fourth Amendment (as defined in Note 10) to the Amended EQM Credit Facility.

Eureka Credit Facility. On May 13, 2021, Eureka Midstream, LLC (Eureka) entered into a $400 million senior secured revolving credit facility with Sumitomo Mitsui Banking Corporation, as administrative agent, the lenders party thereto from time to time and any other persons party thereto from time to time (the 2021 Eureka Credit Facility). On March 29, 2023, Eureka entered into an amendment (the First Eureka Amendment) to the 2021 Eureka Credit Facility. The First Eureka Amendment replaced the London Interbank Offered Rate with the Secured Overnight Financing Rate as the benchmark rate for borrowings, including a credit spread adjustment of 0.10% for all applicable interest periods, as well as for daily swing line borrowings. Any reference to the 2021 Eureka Credit Facility as of any particular date shall mean the 2021 Eureka Credit Facility as in effect on such date.

As of September 30, 2023, and December 31, 2022, Eureka had approximately $315 million and $295 million, respectively, of borrowings outstanding under the 2021 Eureka Credit Facility. For the three and nine months ended September 30, 2023, the

maximum amount of outstanding borrowings under the 2021 Eureka Credit Facility at any time were approximately $315 million, the average daily balances were approximately $315 million and $307 million, respectively, and Eureka incurred interest at weighted average annual interest rates of approximately 8.0% and 7.6%, respectively. For the three and nine months ended September 30, 2023, commitment fees of $0.1 million and $0.3 million, respectively, were paid to maintain credit availability under the 2021 Eureka Credit Facility. For the three and nine months ended September 30, 2022, the maximum amount of outstanding borrowings under the 2021 Eureka Credit Facility at any time was approximately $295 million, the average daily balances were approximately $290 million and $296 million, respectively, and Eureka incurred interest at weighted average annual interest rates of approximately 4.8% and 4.3%, respectively. For the three and nine months ended September 30, 2022, commitment fees of $0.1 million and $0.4 million, respectively, were paid to maintain credit availability under the 2021 Eureka Credit Facility.

See Note 10 for a discussion of the Second Eureka Amendment (as defined in Note 10) to the 2021 Eureka Credit Facility.

2023 Senior Notes Redemption. On June 21, 2023 (the Redemption Date), EQM redeemed in full its remaining outstanding 4.75% Senior Notes due 2023 (the 2023 Notes) in the aggregate principal amount of $98.9 million, pursuant the Indenture, dated as of August 1, 2014, by and between EQM, the subsidiary guarantors party thereto and The Bank of New York Mellon Trust Company, N.A. (BNYMTC), as trustee, as supplemented by that certain Third Supplemental Indenture, dated as of June 25, 2018, by and between the EQM and BNYMTC, at a redemption price equal to 100% of the principal amount of the 2023 Notes, plus accrued and unpaid interest to, but not including, the Redemption Date. Upon the redemption by EQM of the 2023 Notes, the Third Supplemental Indenture was discharged and ceased to be of further effect except as to rights thereunder. EQM utilized cash on hand to effect payment of the redemption on the Redemption Date.

2022 Senior Notes. On June 7, 2022, EQM completed a private offering of $500 million aggregate principal amount of new 7.50% senior notes due 2027 (the 2027 Notes) and $500 million aggregate principal amount of new 7.50% senior notes due 2030 (the 2030 Notes and, together with the 2027 Notes, the 2022 Senior Notes) and received net proceeds from the offering of approximately $984.5 million inclusive of a discount of approximately $12.5 million and debt issuance costs of approximately $3.0 million.

EQM used the net proceeds from the offering of the 2022 Senior Notes and cash on hand to purchase (i) an aggregate principal amount of approximately $501.1 million of its then outstanding 2023 Notes pursuant to a tender offer for any and all of the outstanding 2023 Notes (the Any and All Tender Offer) and an open market purchase following the expiration of the Any and All Tender Offer, and (ii) an aggregate principal amount of $300 million of its outstanding 6.00% notes due 2025 (2025 Notes), and an aggregate principal amount of $200 million of its outstanding 4.00% notes due 2024 (2024 Notes), pursuant to tender offers (the Maximum Tender Offers, together with the Any and All Tender Offer, the 2022 Tender Offers) for the 2025 Notes and 2024 Notes, which such Maximum Tender Offers reflected a maximum aggregate principal amount of 2025 Notes and 2024 Notes to be purchased of $500 million (such amount, the Aggregate Maximum Principal Amount).

2022 Tender Offers. On June 6, 2022, the Any and All Tender Offer expired and, on June 7, 2022 and June 9, 2022, EQM purchased an aggregate principal amount of approximately $496.8 million of 2023 Notes at an aggregate cost of approximately $506.7 million pursuant to the Any and All Tender Offer. On June 10, 2022, which was after the closing of the Any and All Tender Offer, EQM also repurchased an aggregate principal amount of approximately $4.3 million of 2023 Notes in the open market at an aggregate cost of approximately $4.4 million. On June 13, 2022, which was the early tender deadline for the Maximum Tender Offers, the Aggregate Maximum Principal Amount was fully subscribed by the 2024 Notes and 2025 Notes then tendered, and, on June 14, 2022, EQM purchased an aggregate principal amount of $200 million of 2024 Notes and $300 million of 2025 Notes at an aggregate cost of approximately $509 million (inclusive of the applicable early tender premium for the 2024 Notes and 2025 Notes described in that certain Offer to Purchase of EQM dated May 31, 2022, as amended).

During the nine months ended September 30, 2022, the Company incurred a loss on extinguishment of debt of approximately $24.9 million related to the payment of the 2022 Tender Offers and open market repurchase premiums and fees, and write off of the respective unamortized discounts and financing costs associated with the purchase of portions of 2023, 2024 and 2025 Notes in the 2022 Tender Offers. This amount is included in the loss on extinguishment of debt line on the statements of consolidated comprehensive income.

As of September 30, 2023, EQM and Eureka were in compliance with all debt provisions and covenants.

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Fair Value Measurements

9 Months Ended

Sep. 30, 2023

Fair Value Disclosures [Abstract]

Fair Value Measurements

Fair Value MeasurementsAssets Measured at Fair Value on a Recurring Basis. The Company records derivative instruments at fair value on a gross basis in its consolidated balance sheets. The EQT Global GGA provides for potential cash bonus payments payable by EQT to the Company during the period beginning on the first day of the calendar quarter in which the MVP full in-service date occurs

through the calendar quarter ending December 31, 2024 (the Henry Hub cash bonus payment provision). The potential cash bonus payments are conditioned upon the quarterly average of certain Henry Hub natural gas prices exceeding certain price thresholds. The Henry Hub cash bonus payment provision is accounted for as a derivative instrument and recorded at its estimated fair value using a Monte Carlo simulation model. Significant inputs used in the fair value measurement include NYMEX Henry Hub natural gas futures prices as of the date of valuation, probability-weighted assumptions regarding MVP project completion, risk-free interest rates based on U.S. Treasury rates, expected volatility of NYMEX Henry Hub natural gas futures prices and an estimated credit spread of EQT. The probability-weighted assumptions regarding MVP project completion utilizing internally developed methodologies, and the expected volatility of NYMEX Henry Hub natural gas futures prices, used in the valuation methodology represent significant unobservable inputs causing the Henry Hub cash bonus payment provision to be designated as a Level 3 fair value measurement. An expected average volatility of approximately 50.0% was utilized in the valuation model, which is based on market-quoted volatilities of relevant NYMEX Henry Hub natural gas forward prices.

As of September 30, 2023, the fair value of the Henry Hub cash bonus payment provision was $30.4 million, of which $25.3 million was recorded in other current assets and $5.1 million was recorded in other assets on the Company's consolidated balance sheets. As of December 31, 2022, the fair value of the Henry Hub cash bonus payment provision was $23.0 million which was recorded in other assets on the Company's consolidated balance sheets. During the three and nine months ended September 30, 2023, the Company recognized a loss of $3.4 million and a gain of $7.5 million, respectively, and during the three and nine months ended September 30, 2022, the Company recognized a loss of $0.8 million and a gain of $4.5 million, respectively, representing the change in estimated fair value of the derivative instrument during the respective periods, which in each case are recorded in other (expense) income, net in the Company's statements of consolidated comprehensive income.

Other Financial Instruments. The carrying values of cash and cash equivalents, accounts receivable and accounts payable approximate fair value due to the short maturity of the instruments. The carrying values of borrowings under the Amended EQM Credit Facility and the 2021 Eureka Credit Facility approximate fair value as the interest rates are based on prevailing market rates. As EQM's borrowings under its senior notes are not actively traded, their fair values are estimated using an income approach model that applies a discount rate based on prevailing market rates for debt with similar remaining time-to-maturity and credit risk; as such, their fair values are Level 2 fair value measurements. The fair value of the Preferred Interest is a Level 3 fair value measurement and is estimated using an income approach model that applies a market-based discount rate. As of September 30, 2023, and December 31, 2022, the estimated fair values of the Preferred Interest were approximately $88.5 million and $95.2 million, respectively, and the carrying values of the Preferred Interest were approximately $90.0 million and $94.3 million, respectively. As of September 30, 2023, the carrying value of the Preferred Interest exceeded its estimated fair value, which was considered temporary and not material.

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Earnings Per Share	9 Months Ended
	Sep. 30, 2023
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per ShareThe Company excluded 1,033 (in thousands) of weighted average anti-dilutive securities related to stock-based compensation awards from the computation of diluted weighted average common shares outstanding for the nine months ended September 30, 2023. The Company excluded 844 and 782 (in thousands) of weighted average anti-dilutive securities related to stock-based compensation awards from the computation of diluted weighted average common shares outstanding for the three and nine months ended September 30, 2022, respectively. The Equitrans Midstream Preferred Shares were anti-dilutive to the computation of diluted weighted average common shares outstanding for all periods presented.The Company grants Equitrans Midstream phantom units to non-employee directors that will be paid in Equitrans Midstream common stock upon the director's termination of service from the Company's Board of Directors. As there are no remaining service, performance or market conditions related to these awards, 819 and 723 (in thousands) Equitrans Midstream phantom units were included in the computation of basic and diluted weighted average common shares outstanding for the three and nine months ended September 30, 2023, respectively, and 567 and 599 (in thousands) Equitrans Midstream phantom units were included in the computation of basic and diluted weighted average common shares outstanding for the three and nine months ended September 30, 2022, respectively.

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Income Taxes

9 Months Ended

Sep. 30, 2023

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes The Company's effective tax rate was (9.2)% for the three months ended September 30, 2023 compared to 0.1% for the three months ended September 30, 2022. The Company's effective tax rate was (4.9)% for the nine months ended September 30, 2023 compared to (2.4)% for the nine months ended September 30, 2022. The Company calculates the provision for income taxes for interim periods by applying an estimate of the annual effective tax rate for the full fiscal year to "ordinary" income or loss (income (loss) before income taxes excluding unusual or infrequently occurring items) for the periods. The effective tax rate was lower for the three and nine months ended September 30, 2023 compared to the three and nine months ended September 30, 2022 and lower compared to the statutory rate for the three and nine months ended September 30, 2023 primarily due to the impact of projected AFUDC – equity on the MVP project and the impact of changes in the valuation allowance that

limit tax benefits for the Company’s federal and state deferred tax assets. The effective tax rate for the three and nine months ended September 30, 2022 was lower than the statutory rate due to the increase in the valuation allowances that limit tax benefits for the Company’s federal and state deferred tax assets, primarily due to the impairment of the Company's equity method investment in the MVP Joint Venture and its impact on the loss before income taxes.

For the nine months ended September 30, 2023, the Company recorded unrecognized tax benefits and interest of $1.2 million. During the three months ended September 30, 2023, unrecognized tax benefits and interest decreased by approximately $1.0 million due to the expiration of statutes of limitation, which impacted the effective tax rate. Interest on unrecognized tax benefits was $0.2 million for the nine months ended September 30, 2023, which was recorded as a component of income tax expense.

For the nine months ended September 30, 2023, the Company believes that it is more likely than not that the benefit from a portion of its federal and state net operating loss (NOL) carryforwards, deferred tax assets related to interest disallowance under Internal Revenue Code Section 163(j), and certain state deferred tax assets, net of offsetting deferred tax liabilities, will not be realized and accordingly, the Company maintains related valuation allowances. For the nine months ended September 30, 2023, the Company recorded approximately $68.3 million income tax benefit related to changes in valuation allowances because of decreases in federal and state deferred tax assets. As of September 30, 2023 and December 31, 2022, the valuation allowances related to federal and state deferred tax assets were approximately $88.4 million and $156.7 million, respectively.

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Subsequent Events

9 Months Ended

Sep. 30, 2023

Subsequent Events [Abstract]

Subsequent Events

Subsequent Events

On October 5, 2023, Eureka entered into an amendment (the Second Eureka Amendment) to the 2021 Eureka Credit Facility. The Second Eureka Amendment extended the stated maturity date of the 2021 Eureka Credit Facility, with such extension only applicable for the lenders approving the Second Eureka Amendment, from November 13, 2024 to November 13, 2025.

On October 6, 2023 (the Fourth Amendment Date), EQM entered into an amendment (the Fourth Amendment) to the Amended EQM Credit Facility. The Fourth Amendment extended the stated maturity date of the Amended EQM Credit Facility with such extension only applicable for the lenders approving the Fourth Amendment, from April 30, 2025 to April 30, 2026. After giving effect to such extension contemplated by the Fourth Amendment, EQM has aggregate commitments available under the Amended EQM Credit Facility of approximately $2.16 billion before October 31, 2023, approximately $1.55 billion in aggregate commitments available on and after October 31, 2023 and prior to April 30, 2025, and approximately $1.45 billion in aggregate commitments available on and after April 30, 2025 and prior to April 30, 2026.

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Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022		Sep. 30, 2023	Sep. 30, 2022
Pay vs Performance Disclosure
Net Income (Loss) Attributable to Parent	$ 127,432	$ (505,865)	[1]	$ 296,359	$ (349,956)	[1]

[1] Certain line items of the previously issued unaudited interim consolidated financial statements for the three and nine months ended September 30, 2022 have been revised. See Note 1 for more information.

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Insider Trading Arrangements	3 Months Ended
	Sep. 30, 2023
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

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Financial Statements (Policies)

9 Months Ended

Sep. 30, 2023

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation

Basis of Presentation. References in these financial statements to Equitrans Midstream or the Company refer collectively to Equitrans Midstream Corporation and its consolidated subsidiaries for all periods presented, unless otherwise indicated.

The accompanying unaudited consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States (GAAP) for interim financial information and with the requirements of Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, these unaudited consolidated financial statements include all adjustments (consisting of only normal, recurring adjustments, unless otherwise disclosed in this Quarterly Report on Form 10-Q) necessary for a fair presentation of the financial position of the Company as of September 30, 2023, the results of its operations and equity for the three and nine months ended September 30, 2023 and 2022 and its cash flows for the nine months ended September 30, 2023 and 2022. The consolidated balance sheet at December 31, 2022 has been derived from the audited financial statements at that date, but does not include all of the information and notes required by GAAP for complete financial statements. This Quarterly Report on Form 10-Q should be read in conjunction with the Company's Annual Report on Form 10-K for the year ended December 31, 2022, which includes all disclosures required by GAAP.

Due to, among other things, the seasonal nature of the Company's utility customer contracts, as well as producers’ well completion activities and varying needs for fresh and produced water (which are primarily driven by horizontal lateral lengths and the number of completion stages per well), the interim statements for the three and nine months ended September 30, 2023 are not necessarily indicative of the results that may be expected for the year ending December 31, 2023.

For further information, refer to the Company's consolidated financial statements and related notes in the Company's Annual Report on Form 10-K for the year ended December 31, 2022, as well as Part I, "Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations" contained herein.

Recently Issued Accounting Standards

Recently Issued Accounting Standards.

In March 2020, the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848), which provides practical expedients for contract modifications and certain hedging relationships associated with the transition from reference rates that are expected to be discontinued. This guidance is applicable to the calculation of each dividend following March 31, 2024 for the Equitrans Midstream Preferred Shares pursuant to the Company's Second Amended and Restated Articles of Incorporation, as well as any Company contracts that use the London Inter-Bank Offered Rate as a reference rate. In December 2022, the FASB also issued ASU 2022-06, which amended Topic 848 to defer the sunset date to apply the practical expedients until December 31, 2024. The Company adopted this standard on April 1, 2023 and it had no impact on the Company's financial statements and related disclosures.

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Financial Information by Business Segment (Tables)

9 Months Ended

Sep. 30, 2023

Segment Reporting [Abstract]

Schedule of Revenue from External Customers and Operating Income and Reconciliation to Net Income

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
	(Thousands)
Revenues from customers:
Gathering	$	220,087	$	227,180	$	641,033	$	672,284
Transmission	98,575		91,557		330,021		293,430
Water	19,852		13,014		62,266		36,794
Total operating revenues	$	338,514	$	331,751	$	1,033,320	$	1,002,508
Operating income (loss):
Gathering	$	101,134	$	112,279	$	286,448	$	345,695
Transmission	55,808		64,077		203,181		209,480
Water	(2,251)		2,342		10,652		3,537
Headquarters (a)	(402)		(368)		(1,214)		(984)
Total operating income	$	154,289	$	178,330	$	499,067	$	557,728
Reconciliation of operating income to net income (loss):
Equity income (b)	$	73,810	$	48	$	97,618	$	91
Impairment of equity method investment (b)	—		(583,057)		—		(583,057)
Other (expense) income, net (c)	(3,037)		2,465		8,670		8,124
Loss on extinguishment of debt	—		—		—		(24,937)
Net interest expense	(106,334)		(101,085)		(314,935)		(289,323)
Income tax (benefit) expense	(10,976)		(366)		(14,295)		7,927
Net income (loss)	$	129,704	$	(502,933)	$	304,715	$	(339,301)

(a)Includes certain unallocated corporate expenses.

(b)Equity income and impairment of equity method investment are included in the Transmission segment.

(c)Includes unrealized (loss) gain on derivative instruments recorded in the Gathering segment.

Schedule of Segment Assets

	September 30, 2023		December 31, 2022
	(Thousands)
Segment assets:
Gathering	$	7,605,477	$	7,610,233
Transmission (a)	2,808,259		2,333,896
Water	209,967		218,680
Total operating segments	10,623,703		10,162,809
Headquarters, including cash	408,954		282,776
Total assets	$	11,032,657	$	10,445,585

(a)The equity method investment in the MVP Joint Venture is included in the Transmission segment.

Schedule of Depreciation and Amortization and Expenditures for Segment Assets

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
	(Thousands)
Depreciation:
Gathering	$	48,585	$	49,125	$	147,321	$	145,953
Transmission	14,004		13,909		41,796		41,707
Water	6,655		5,162		19,029		14,483
Headquarters	104		376		637		1,129
Total	$	69,348	$	68,572	$	208,783	$	203,272
Capital expenditures:
Gathering (a)	$	67,551	$	73,589	$	199,157	$	195,925
Transmission (b)	31,332		12,429		54,896		22,994
Water	9,574		17,041		31,798		49,132
Headquarters	—		—		—		13
Total (c)	$	108,457	$	103,059	$	285,851	$	268,064

(a)Includes capital expenditures related to the noncontrolling interest in Eureka Midstream Holdings, LLC (Eureka Midstream) of approximately $3.3 million and $11.5 million for the three and nine months ended September 30, 2023, respectively, and approximately $5.9 million and $17.6 million for the three and nine months ended September 30, 2022, respectively.

(b)Transmission capital expenditures do not include aggregate capital contributions made to the MVP Joint Venture for the MVP and MVP Southgate projects of approximately $209.9 million and $280.5 million for the three and nine months ended September 30, 2023, respectively, and approximately $46.4 million and $158.2 million for the three and nine months ended September 30, 2022, respectively.

(c)The Company accrues capital expenditures when the work has been completed but the associated bills have not yet been paid. Accrued capital expenditures are excluded from the statements of consolidated cash flows until they are paid. The net impact of non-cash capital expenditures, including the effect of accrued capital expenditures, transfers to/from inventory as assets are completed/assigned to a project and capitalized share-based compensation costs were $(0.9) million and $(6.4) million for the three and nine months ended September 30, 2023, respectively, and $10.7 million and $8.8 million for the three and nine months ended September 30, 2022, respectively.

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Revenue from Contracts with Customers (Tables)

9 Months Ended

Sep. 30, 2023

Revenue from Contract with Customer [Abstract]

Schedule of Disaggregated Revenue Information, By Segment

The tables below provide disaggregated revenue information by business segment.

	Three Months Ended September 30, 2023
	Gathering		Transmission		Water		Total
	(Thousands)
Firm reservation fee revenues (a)	$	147,137	$	82,508	$	11,029	$	240,674
Volumetric-based fee revenues	72,950		16,067		8,823		97,840
Total operating revenues	$	220,087	$	98,575	$	19,852	$	338,514
	Three Months Ended September 30, 2022
	Gathering		Transmission		Water		Total
	(Thousands)
Firm reservation fee revenues (a)	$	144,730	$	84,584	$	9,375	$	238,689
Volumetric-based fee revenues	82,450		6,973		3,639		93,062
Total operating revenues	$	227,180	$	91,557	$	13,014	$	331,751

	Nine Months Ended September 30, 2023
	Gathering		Transmission		Water		Total
	(Thousands)
Firm reservation fee revenues (a)	$	428,945	$	266,477	$	29,793	$	725,215
Volumetric-based fee revenues (b)	212,088		63,544		32,473		308,105
Total operating revenues	$	641,033	$	330,021	$	62,266	$	1,033,320
	Nine Months Ended September 30, 2022
	Gathering		Transmission		Water		Total
	(Thousands)
Firm reservation fee revenues (a)	$	415,932	$	272,129	$	24,502	$	712,563
Volumetric-based fee revenues	256,352		21,301		12,292		289,945
Total operating revenues	$	672,284	$	293,430	$	36,794	$	1,002,508

(a) Firm reservation fee revenues associated with Gathering included MVC unbilled revenues of approximately $1.8 million and $7.5 million for the three and nine months ended September 30, 2023, respectively, and $8.5 million and $17.4 million for the three and nine months ended September 30, 2022, respectively.

(b) For the nine months ended September 30, 2023, volumetric-based fee revenues associated with Gathering and Transmission included one-time contract buyouts by a customer for approximately $5.0 million and $23.8 million, respectively.

Schedule of Contract with Customer, Asset and Liability

The following table presents changes in the Company's unbilled revenue balance:

	Nine Months Ended September 30,
	2023		2022
	(Thousands)
Balance as of beginning of period	$	27,493	$	16,772
Revenue recognized in excess of amounts invoiced (a)	7,530		19,436
Minimum volume commitments invoiced (b)	(23,558)		(14,884)
Amortization (c)	(494)		(334)
Balance as of end of period	$	10,971	$	20,990

(a)Primarily includes revenues associated with MVCs that are generally included in firm reservation fee revenues within the Gathering and Water segments.

(b)Unbilled revenues are transferred to accounts receivable once the Company has an unconditional right to consideration from the customer.

(c)Amortization of capitalized contract costs paid to customers over the expected life of the agreement.

The following table presents changes in the Company's contract liability balances:

	Nine Months Ended September 30,
	2023		2022
	(Thousands)
Balance as of beginning of period	$	973,087	$	822,416
Amounts recorded during the period (a)	250,061		266,792
Change in estimated variable consideration (b)	(5,330)		(4,837)
Amounts transferred during the period (c)	(4,317)		(942)
EQT Cash Option	—		(195,820)
Balance as of end of period	$	1,213,501	$	887,609

(a)Includes deferred billed revenue during the nine months ended September 30, 2023 and 2022 primarily associated with the EQT Global GGA.

(b)For the nine months ended September 30, 2023, the change in estimated variable consideration represents the decrease in total deferred revenue due to changes in MVP timing assumptions. For the nine months ended September 30, 2022, the change in estimated variable consideration represents the decrease in total deferred revenue required for gathering MVC revenue with a declining rate structure, resulting from the EQT Cash Option election that required total estimated gathering consideration to be increased.

(c)Deferred revenues are recognized as revenue upon satisfaction of the Company's performance obligation to the customer.

Schedule of Remaining Performance Obligations

The following table summarizes the estimated transaction price allocated to the Company's remaining performance obligations under all contracts with firm reservation fees, MVCs and/or ARCs as of September 30, 2023 that the Company will invoice or transfer from contract liabilities and recognize in future periods.

		2023(a)		2024		2025		2026		2027		Thereafter		Total
	(Thousands)
Gathering firm reservation fees		$	25,390	$	156,078	$	177,127	$	167,692	$	161,018	$	1,726,068	$	2,413,373
Gathering revenues supported by MVCs		114,809		427,169		456,995		489,335		487,366		3,169,121		5,144,795
Transmission firm reservation fees		94,184		394,879		394,766		393,300		394,490		3,149,178		4,820,797
Water revenues supported by ARCs		9,375		45,706		48,441		45,159		44,065		166,644		359,390
Total (b)		$	243,758	$	1,023,832	$	1,077,329	$	1,095,486	$	1,086,939	$	8,211,011	$	12,738,355

(a)    October 1, 2023 through December 31, 2023.

(b)    Includes assumptions regarding timing for placing certain projects in-service. Such assumptions may not be realized and delays in the in-service dates for projects have substantially altered, and any future additional delays may further substantially alter, the remaining performance obligations for certain contracts with firm reservation fees, MVCs and/or ARCs. The MVP Joint Venture is accounted for as an equity method investment and those amounts are not included in the table above.

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Investments in Unconsolidated Entity (Tables)

9 Months Ended

Sep. 30, 2023

Equity Method Investments and Joint Ventures [Abstract]

Schedule of Unaudited Condensed Financial Statements for the Investment in Unconsolidated Equity

the following tables summarize the unaudited condensed consolidated financial statements of the MVP Joint Venture in relation to the MVP project.

Condensed Balance Sheets

	September 30, 2023		December 31, 2022
	(Thousands)
Current assets	$	250,231	$	71,535
Non-current assets	7,510,768		6,737,064
Total assets	$	7,760,999	$	6,808,599
Current liabilities	$	236,947	$	118,679
Equity	7,524,052		6,689,920
Total liabilities and equity	$	7,760,999	$	6,808,599

Condensed Statements of Operations

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
	(Thousands)
Operating (expense) income	$	—	$	(20)	$	—	$	20
Other income	1,368		—		1,930		—
Net interest income	46,191		120		61,114		172
AFUDC - equity	107,785		—		142,607		—
Net income	$	155,344	$	100	$	205,651	$	192

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Stock-based Compensation Plans (Tables)

9 Months Ended

Sep. 30, 2023

Share-Based Payment Arrangement [Abstract]

Schedule of Detailed Information on MVP PSU Program Activity

The following table provides detailed information on the MVP PSU Program as of September 30, 2023:

MVP PSU Program	Non-vested Shares	Grant Date Fair Value (a)	Fair Value (Thousands)		Requisite Service Period	Unrecognized Compensation Cost (Thousands)
LTIP Participants	1,367,983	$9.59	$	13,119	28 months	$	1,551
Senior Executives T1	579,015	$9.59	5,553		28 months	666
Senior Executives T2	289,511	$9.59	2,776		40 months	1,126
Senior Executives T3	289,504	$9.59	2,776		52 months	1,530

(a)    Determined based upon the closing price of the Company's common stock on the day before the grant date.

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Financial Statements (Details)	Sep. 30, 2023 primaryAsset
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of primary assets through which services are provided	3

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Financial Information by Business Segment - Narrative (Details)	9 Months Ended
	Sep. 30, 2023 lineOfBusiness segment
Segment Reporting [Abstract]
Number of operating segments | segment	3
Number of lines of business | lineOfBusiness	3

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Financial Information by Business Segment - Schedule of Segment Income (Details) - USD ($) $ in Thousands		3 Months Ended			9 Months Ended
		Sep. 30, 2023	Sep. 30, 2022		Sep. 30, 2023		Sep. 30, 2022
Revenues from customers:
Total operating revenues		$ 338,514	$ 331,751	[1]	$ 1,033,320		$ 1,002,508	[1]
Operating income (loss):
Total operating income		154,289	178,330	[1]	499,067		557,728	[1]
Reconciliation of operating income to net income (loss):
Equity income	[2]	73,810	48	[1]	97,618	[3]	91	[1],[3],[4]
Impairment of equity method investment		0	(583,057)	[1]	0		(583,057)	[1]
Other (expense) income, net		(3,037)	2,465	[1]	8,670		8,124	[1]
Loss on extinguishment of debt		0	0	[1]	0		(24,937)	[1],[4]
Net interest expense		(106,334)	(101,085)	[1]	(314,935)		(289,323)	[1]
Income tax (benefit) expense		(10,976)	(366)	[1]	(14,295)		7,927	[1]
Net income (loss)		129,704	(502,933)	[1]	304,715		(339,301)	[1],[4]
Gathering
Revenues from customers:
Total operating revenues		220,087	227,180		641,033		672,284
Transmission
Revenues from customers:
Total operating revenues		98,575	91,557		330,021		293,430
Water
Revenues from customers:
Total operating revenues		19,852	13,014		62,266		36,794
Operating Segments | Gathering
Revenues from customers:
Total operating revenues		220,087	227,180		641,033		672,284
Operating income (loss):
Total operating income		101,134	112,279		286,448		345,695
Operating Segments | Transmission
Revenues from customers:
Total operating revenues		98,575	91,557		330,021		293,430
Operating income (loss):
Total operating income		55,808	64,077		203,181		209,480
Operating Segments | Water
Revenues from customers:
Total operating revenues		19,852	13,014		62,266		36,794
Operating income (loss):
Total operating income		(2,251)	2,342		10,652		3,537
Headquarters
Operating income (loss):
Total operating income		$ (402)	$ (368)		$ (1,214)		$ (984)

[1] Certain line items of the previously issued unaudited interim consolidated financial statements for the three and nine months ended September 30, 2022 have been revised. See Note 1 for more information.

[2] Represents equity income from Mountain Valley Pipeline, LLC (the MVP Joint Venture). See Note 4.

[3] Represents equity income from the MVP Joint Venture. See Note 4.

[4] Certain line items of the previously issued unaudited interim consolidated financial statements for the nine months ended September 30, 2022 have been revised. See Note 1 for more information.

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Financial Information by Business Segment - Schedule of Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Long-Lived Assets
Total assets	$ 11,032,657	$ 10,445,585
Operating Segments
Long-Lived Assets
Total assets	10,623,703	10,162,809
Operating Segments | Gathering
Long-Lived Assets
Total assets	7,605,477	7,610,233
Operating Segments | Transmission
Long-Lived Assets
Total assets	2,808,259	2,333,896
Operating Segments | Water
Long-Lived Assets
Total assets	209,967	218,680
Headquarters
Long-Lived Assets
Total assets	$ 408,954	$ 282,776

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Financial Information by Business Segment - Schedule of Depreciation and Capital Expenditures for Segment Assets (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022		Sep. 30, 2023	Sep. 30, 2022
Segment Information
Depreciation	$ 69,348	$ 68,572	[1]	$ 208,783	$ 203,272	[1],[2]
Capital expenditures for segment assets	108,457	103,059		285,851	268,064
Capitalized share-based compensation cost	(900)	10,700		(6,400)	8,800
Operating Segments | Gathering
Segment Information
Depreciation	48,585	49,125		147,321	145,953
Capital expenditures for segment assets	67,551	73,589		199,157	195,925
Operating Segments | Gathering | Eureka Midstream Holdings, LLC
Segment Information
Capital expenditures for segment assets	3,300	5,900		11,500	17,600
Operating Segments | Transmission
Segment Information
Depreciation	14,004	13,909		41,796	41,707
Capital expenditures for segment assets	31,332	12,429		54,896	22,994
Operating Segments | Transmission | MVP Southgate Project
Segment Information
Capital expenditures for segment assets	209,900	46,400		280,500	158,200
Operating Segments | Water
Segment Information
Depreciation	6,655	5,162		19,029	14,483
Capital expenditures for segment assets	9,574	17,041		31,798	49,132
Headquarters
Segment Information
Depreciation	104	376		637	1,129
Capital expenditures for segment assets	$ 0	$ 0		$ 0	$ 13

[1] Certain line items of the previously issued unaudited interim consolidated financial statements for the three and nine months ended September 30, 2022 have been revised. See Note 1 for more information.

[2] Certain line items of the previously issued unaudited interim consolidated financial statements for the nine months ended September 30, 2022 have been revised. See Note 1 for more information.

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Revenue from Contracts with Customers - Schedule of Disaggregated Revenue Information, by Business Segment (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022		Sep. 30, 2023	Sep. 30, 2022
Disaggregation of Revenue
Total operating revenues	$ 338,514	$ 331,751	[1]	$ 1,033,320	$ 1,002,508	[1]
Contract Buyouts
Disaggregation of Revenue
Total operating revenues				5,000	23,800
Gathering
Disaggregation of Revenue
Total operating revenues	220,087	227,180		641,033	672,284
Gathering | MVC
Disaggregation of Revenue
Total operating revenues	1,800	8,500		7,500	17,400
Transmission
Disaggregation of Revenue
Total operating revenues	98,575	91,557		330,021	293,430
Water
Disaggregation of Revenue
Total operating revenues	19,852	13,014		62,266	36,794
Firm reservation fee revenues
Disaggregation of Revenue
Total operating revenues	240,674	238,689		725,215	712,563
Firm reservation fee revenues | Gathering
Disaggregation of Revenue
Total operating revenues	147,137	144,730		428,945	415,932
Firm reservation fee revenues | Transmission
Disaggregation of Revenue
Total operating revenues	82,508	84,584		266,477	272,129
Firm reservation fee revenues | Water
Disaggregation of Revenue
Total operating revenues	11,029	9,375		29,793	24,502
Volumetric-based fee revenues
Disaggregation of Revenue
Total operating revenues	97,840	93,062		308,105	289,945
Volumetric-based fee revenues | Gathering
Disaggregation of Revenue
Total operating revenues	72,950	82,450		212,088	256,352
Volumetric-based fee revenues | Transmission
Disaggregation of Revenue
Total operating revenues	16,067	6,973		63,544	21,301
Volumetric-based fee revenues | Water
Disaggregation of Revenue
Total operating revenues	$ 8,823	$ 3,639		$ 32,473	$ 12,292

[1] Certain line items of the previously issued unaudited interim consolidated financial statements for the three and nine months ended September 30, 2022 have been revised. See Note 1 for more information.

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Revenue from Contracts with Customers - Schedule of Unbilled Revenue Rollforward (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Movement in Deferred Revenue [Roll Forward]
Balance as of beginning of period	$ 27,493	$ 16,772
Revenue recognized in excess of amounts invoiced	7,530	19,436
Minimum volume commitments invoiced	(23,558)	(14,884)
Amortization	(494)	(334)
Balance as of end of period	$ 10,971	$ 20,990

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Revenue from Contracts with Customers - Schedule of Deferred Revenue Rollforward (Details) - USD ($) $ in Thousands		9 Months Ended
	Jul. 08, 2022	Sep. 30, 2023	Sep. 30, 2022
Change in Contract with Customer, Liability
Balance as of beginning of period		$ 973,087	$ 822,416
Amounts recorded during the period		250,061	266,792
Change in estimated variable consideration		(5,330)	(4,837)
Amounts transferred during the period		(4,317)	(942)
EQT Cash Option	$ 195,800	0	(195,820)
Balance as of end of period		$ 1,213,501	$ 887,609

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Revenue from Contracts with Customers - Schedule of Remaining Performance Obligations (Details) $ in Thousands	Sep. 30, 2023 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Total	$ 12,738,355
Transmission firm reservation fees
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Total	4,820,797
Water revenues supported by ARCs
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Total	359,390
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Total	243,758
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-10-01 | Transmission firm reservation fees
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Total	$ 94,184
Remaining performance obligations, expected timing	3 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-10-01 | Water revenues supported by ARCs
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Total	$ 9,375
Remaining performance obligations, expected timing	3 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Total	$ 1,023,832
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 | Transmission firm reservation fees
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Total	$ 394,879
Remaining performance obligations, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 | Water revenues supported by ARCs
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Total	$ 45,706
Remaining performance obligations, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Total	$ 1,077,329
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 | Transmission firm reservation fees
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Total	$ 394,766
Remaining performance obligations, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 | Water revenues supported by ARCs
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Total	$ 48,441
Remaining performance obligations, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Total	$ 1,095,486
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 | Transmission firm reservation fees
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Total	$ 393,300
Remaining performance obligations, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 | Water revenues supported by ARCs
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Total	$ 45,159
Remaining performance obligations, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Total	$ 1,086,939
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01 | Transmission firm reservation fees
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Total	$ 394,490
Remaining performance obligations, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01 | Water revenues supported by ARCs
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Total	$ 44,065
Remaining performance obligations, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Total	$ 8,211,011
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01 | Transmission firm reservation fees
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Total	$ 3,149,178
Remaining performance obligations, expected timing
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01 | Water revenues supported by ARCs
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Total	$ 166,644
Remaining performance obligations, expected timing
Gathering firm reservation fees | Gathering
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Total	$ 2,413,373
Gathering firm reservation fees | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-10-01 | Gathering
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Total	$ 25,390
Remaining performance obligations, expected timing	3 months
Gathering firm reservation fees | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 | Gathering
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Total	$ 156,078
Remaining performance obligations, expected timing	1 year
Gathering firm reservation fees | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 | Gathering
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Total	$ 177,127
Remaining performance obligations, expected timing	1 year
Gathering firm reservation fees | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 | Gathering
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Total	$ 167,692
Remaining performance obligations, expected timing	1 year
Gathering firm reservation fees | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01 | Gathering
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Total	$ 161,018
Remaining performance obligations, expected timing	1 year
Gathering firm reservation fees | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01 | Gathering
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Total	$ 1,726,068
Remaining performance obligations, expected timing
Gathering revenues supported by MVCs | Gathering
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Total	$ 5,144,795
Gathering revenues supported by MVCs | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-10-01 | Gathering
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Total	$ 114,809
Remaining performance obligations, expected timing	3 months
Gathering revenues supported by MVCs | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 | Gathering
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Total	$ 427,169
Remaining performance obligations, expected timing	1 year
Gathering revenues supported by MVCs | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 | Gathering
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Total	$ 456,995
Remaining performance obligations, expected timing	1 year
Gathering revenues supported by MVCs | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 | Gathering
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Total	$ 489,335
Remaining performance obligations, expected timing	1 year
Gathering revenues supported by MVCs | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01 | Gathering
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Total	$ 487,366
Remaining performance obligations, expected timing	1 year
Gathering revenues supported by MVCs | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01 | Gathering
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Total	$ 3,169,121
Remaining performance obligations, expected timing

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Revenue from Contracts with Customers - Narrative (Details) - USD ($) $ in Thousands		9 Months Ended
	Jul. 08, 2022	Sep. 30, 2023	Sep. 30, 2022
Disaggregation of Revenue
Option to forgo fee relief, year one	$ 145,000
Option to forgo fee relief, year two	90,000
Cash payment to be made in exchange for fee relief	195,800
Contract liability reduction	$ (195,800)	$ 0	$ 195,820
Gathering
Disaggregation of Revenue
Weighted average remaining term (in years)		13 years
Transmission firm reservation fees
Disaggregation of Revenue
Weighted average remaining term (in years)		11 years

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Investment in Unconsolidated Entities (Details) $ in Thousands	1 Months Ended	3 Months Ended					9 Months Ended
	Sep. 30, 2023 USD ($) mi	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Sep. 30, 2023 USD ($) mi	Sep. 30, 2022 USD ($)	[1]	Sep. 30, 2023 USD ($) mi	Sep. 30, 2022 USD ($)	[1]	Apr. 06, 2023 USD ($)	Nov. 04, 2019 USD ($)	Apr. 30, 2018 mi
Schedule of Equity Method Investments
Impairment of equity method investment				$ 0	$ 583,057		$ 0	$ 583,057
Con Edison | Maximum
Schedule of Equity Method Investments
Investment cap											$ 530,000
MVP Joint Venture
Schedule of Equity Method Investments
Impairment of equity method investment							583,000
Equity method investment	$ 784,000			$ 784,000			$ 784,000
MVP Joint Venture | Measurement Input, Discount Rate
Schedule of Equity Method Investments
Fair value measurement input (as a percent)	0.075			0.075			0.075
MVP Joint Venture | Beneficial Owner
Schedule of Equity Method Investments
Percentage of ownership interest							66.67%
MVP Project | Scenario, Forecast
Schedule of Equity Method Investments
Project target cost		$ 120,000
MVP Project | Con Edison | Scenario, Forecast
Schedule of Equity Method Investments
Project target cost		$ 7,200,000
Variable Interest Entity, Not Primary Beneficiary | MVP Joint Venture | EQM Midstream Partners, LP
Schedule of Equity Method Investments
Ownership interest (as a percent)	47.70%			47.70%			47.70%
Variable Interest Entity, Not Primary Beneficiary | MVP Joint Venture | EQM Midstream Partners, LP | Scenario, Forecast
Schedule of Equity Method Investments
Ownership interest (as a percent)		48.80%
Variable Interest Entity, Not Primary Beneficiary | MVP Project
Schedule of Equity Method Investments
Capital contribution payable to MVP Joint Venture	$ 126,300
Letter of credit outstanding	$ 219,700			$ 219,700			$ 219,700
Variable Interest Entity, Not Primary Beneficiary | MVP Project | Scenario, Forecast
Schedule of Equity Method Investments
Capital contribution payable to MVP Joint Venture			$ 327,000
Variable Interest Entity, Not Primary Beneficiary | MVP Southgate Project
Schedule of Equity Method Investments
Ownership interest (as a percent)	47.20%			47.20%			47.20%
Letter of credit outstanding										$ 14,200
MVP
Schedule of Equity Method Investments
Gas and Oil, Length of Natural Gas Pipeline | mi	300			300			300
MVP | Variable Interest Entity, Not Primary Beneficiary
Schedule of Equity Method Investments
Issuance of performance guarantee, remaining capital obligation (as a percent)	33.00%			33.00%			33.00%
MVP Southgate Project
Schedule of Equity Method Investments
Gas and Oil, Length of Natural Gas Pipeline | mi												75

[1] Certain line items of the previously issued unaudited interim consolidated financial statements for the three and nine months ended September 30, 2022 have been revised. See Note 1 for more information.

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Investments in Unconsolidated Entity - Balance Sheet for the Investment in Unconsolidated Equity (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	[1]	Jun. 30, 2022	[1]	Mar. 31, 2022	[1]	Dec. 31, 2021	[1]
Condensed Balance Sheets
Current assets	$ 487,825			$ 389,702
Total assets	11,032,657			10,445,585
Current liabilities	650,930			413,310
Equity	1,472,552	$ 1,417,958	$ 1,420,018	1,398,604	$ 1,390,822		$ 1,985,495		$ 1,995,871		$ 1,972,486
Total liabilities, mezzanine equity and shareholders' equity	11,032,657			10,445,585
Variable Interest Entity, Not Primary Beneficiary | Equity Method Investment, Nonconsolidated Investee or Group of Investees
Condensed Balance Sheets
Current assets	250,231			71,535
Non-current assets	7,510,768			6,737,064
Total assets	7,760,999			6,808,599
Current liabilities	236,947			118,679
Equity	7,524,052			6,689,920
Total liabilities, mezzanine equity and shareholders' equity	$ 7,760,999			$ 6,808,599

[1] Certain line items of the previously issued unaudited interim consolidated financial statements for the three and nine months ended September 30, 2022 have been revised. See Note 1 for more information.

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Investments in Unconsolidated Entity - Income Statement for the Investment in Unconsolidated Equity (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022		Sep. 30, 2023	Sep. 30, 2022
Schedule of Equity Method Investments
Net income (loss)	$ 129,704	$ (502,933)	[1]	$ 304,715	$ (339,301)	[1],[2]
Variable Interest Entity, Not Primary Beneficiary | Equity Method Investment, Nonconsolidated Investee or Group of Investees
Schedule of Equity Method Investments
Operating (expense) income	0	(20)		0	20
Other income	1,368	0		1,930	0
Net interest income	46,191	120		61,114	172
AFUDC - equity	107,785	0		142,607	0
Net income (loss)	$ 155,344	$ 100		$ 205,651	$ 192

[1] Certain line items of the previously issued unaudited interim consolidated financial statements for the three and nine months ended September 30, 2022 have been revised. See Note 1 for more information.

[2] Certain line items of the previously issued unaudited interim consolidated financial statements for the nine months ended September 30, 2022 have been revised. See Note 1 for more information.

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Stock-based Compensation Plans - Narrative (Details) - MVP Performance Share Unit Program Awards - 2018 Plan - USD ($) $ in Thousands		9 Months Ended
	Nov. 01, 2021	Sep. 30, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Recognized compensation cost		$ 19,400
Recognized compensation cost cumulative catch-up		14,100
Unrecognized compensation cost		$ 4,900
Weighted average vesting term (in years)		9 months 18 days
LTIP Participants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation award, granted (in shares)	1,450,110
Share-based compensation award, will be paid (as a percent)		100.00%
Unrecognized compensation cost		$ 1,551
Weighted average vesting term (in years)		28 months
LTIP Participants | Not Later Than 90 Days After the In-Service Date
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation award, will be paid (as a percent)		50.00%
LTIP Participants | Not Later Than 30 Days After the First Anniversary of the In-Service Date
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation award, will be paid (as a percent)		25.00%
LTIP Participants | Not Later Than 30 Days After the Second Anniversary of the in-service Date
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation award, will be paid (as a percent)		25.00%
Senior Executives
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation award, granted (in shares)	1,158,030

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Stock-based Compensation Plans - Schedule of MVP PSU Program Activity (Details) - MVP Performance Share Unit Program Awards - 2018 Plan $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2023 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Requisite Service Period	9 months 18 days
Unrecognized Compensation Cost (Thousands)	$ 4,900
LTIP Participants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-vested Shares (in shares) | shares	1,367,983
Grant Date Fair Value (in dollars per share) | $ / shares	$ 9.59
Fair Value (Thousands)	$ 13,119
Requisite Service Period	28 months
Unrecognized Compensation Cost (Thousands)	$ 1,551
Senior Executives T1
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-vested Shares (in shares) | shares	579,015
Grant Date Fair Value (in dollars per share) | $ / shares	$ 9.59
Fair Value (Thousands)	$ 5,553
Requisite Service Period	28 months
Unrecognized Compensation Cost (Thousands)	$ 666
Senior Executives T2
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-vested Shares (in shares) | shares	289,511
Grant Date Fair Value (in dollars per share) | $ / shares	$ 9.59
Fair Value (Thousands)	$ 2,776
Requisite Service Period	40 months
Unrecognized Compensation Cost (Thousands)	$ 1,126
Senior Executives T3
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-vested Shares (in shares) | shares	289,504
Grant Date Fair Value (in dollars per share) | $ / shares	$ 9.59
Fair Value (Thousands)	$ 2,776
Requisite Service Period	52 months
Unrecognized Compensation Cost (Thousands)	$ 1,530

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Debt - Amended EQM Revolving Credit Facility and 2019 EQM Term Loan Agreement (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Oct. 06, 2023	Oct. 01, 2023	Dec. 31, 2022
Debt Instrument
Letters of credit outstanding	$ 840,000,000		$ 840,000,000				$ 535,000,000
EQM Credit Facility
Debt Instrument
Maximum borrowing capacity	2,160,000,000		2,160,000,000
EQM Credit Facility | Subsequent Event
Debt Instrument
Maximum borrowing capacity					$ 2,160,000,000
EQM Credit Facility | EQM Midstream Partners, LP | Revolving Credit Facility
Debt Instrument
Borrowings outstanding	525,000,000		525,000,000				240,000,000
Letters of credit outstanding	$ 220,700,000		$ 220,700,000				$ 234,900,000
Weighted average annual interest rate (as a percent)	8.20%	4.80%	7.90%	3.80%
EQM Credit Facility | EQM Midstream Partners, LP | Revolving Credit Facility | Subsequent Event
Debt Instrument
Borrowings outstanding					1,450,000,000
EQM Credit Facility | Line of Credit | Subsequent Event
Debt Instrument
Maximum borrowing capacity					$ 1,550,000,000
EQM Credit Facility | Line of Credit | EQM Midstream Partners, LP
Debt Instrument
Maximum borrowing capacity	$ 1,550,000,000		$ 1,550,000,000
Current borrowing capacity	600,000,000		600,000,000
Maximum amount of short term loans outstanding	525,000,000	$ 190,000,000	525,000,000	$ 280,000,000
Average daily balance of short term loans outstanding	337,000,000	143,000,000	263,000,000	176,000,000
Payment commitment fees	$ 2,000,000	$ 2,300,000	$ 6,400,000	$ 6,100,000
Debt Instrument, Covenant Compliance, Consolidated Leverage Ratio	550.00%		550.00%
EQM Credit Facility | Line of Credit | EQM Midstream Partners, LP | Subsequent Event
Debt Instrument
Debt Instrument, Covenant Compliance, Consolidated Leverage Ratio						585.00%
EQM Credit Facility | Letter of Credit | EQM Midstream Partners, LP
Debt Instrument
Maximum amount of short term loans outstanding			$ 0

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Debt - Eureka Credit Facility (Details) - Eureka Credit Facility - Line of Credit - Eureka Midstream, LLC - USD ($)		3 Months Ended		9 Months Ended
	May 13, 2021	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Debt Instrument
Maximum borrowing capacity	$ 400,000,000
Credit spread adjustment (as a percent)	0.10%
Borrowings outstanding		$ 315,000,000		$ 315,000,000		$ 295,000,000
Maximum amount of short term loans outstanding		315,000,000	$ 295,000,000	315,000,000	$ 295,000,000
Average daily balance of short term loans outstanding		$ 315,000,000	$ 290,000,000	$ 307,000,000	$ 296,000,000
Weighted average annual interest rate (as a percent)		8.00%	4.80%	7.60%	4.30%
Payment commitment fees		$ 100,000	$ 100,000	$ 300,000	$ 400,000

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Debt - 2023 Senior Notes Redemption (Details) - 4.75% Senior Notes Due 2023 - Senior Notes $ in Millions	Jun. 21, 2023 USD ($)
Debt Instrument
Interest rate (as a percent)	4.75%
Debt principal amount redeemed	$ 98.9
Debt instrument, redemption price, percentage of principal amount redeemed (as a percent)	100.00%

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Debt - 2022 Senior Notes (Details) - Senior Notes - USD ($)	Jun. 07, 2022	Jun. 21, 2023	Jun. 14, 2022	Jun. 10, 2022	Jun. 09, 2022
7.50% Senior Notes Due 2027
Debt Instrument
Principal	$ 500,000,000
Interest rate (as a percent)	7.50%
7.50% Senior Notes Due 2030
Debt Instrument
Principal	$ 500,000,000
Interest rate (as a percent)	7.50%
2022 Senior Notes
Debt Instrument
Net proceeds from offering	$ 984,500,000
Discount	12,500,000
Debt issuance costs	3,000,000
2022 Senior Notes | EQT Midstream Partners LP
Debt Instrument
Principal	501,100,000
4.75% Senior Notes Due 2023
Debt Instrument
Interest rate (as a percent)		4.75%
4.75% Senior Notes Due 2023 | EQT Midstream Partners LP
Debt Instrument
Principal				$ 4,300,000	$ 496,800,000
Debt issuance costs				$ 4,400,000	$ 506,700,000
6.00% Senior Notes Due 2025 | EQT Midstream Partners LP
Debt Instrument
Principal	$ 300,000,000		$ 300,000,000
Interest rate (as a percent)	6.00%
4.00% Senior Notes Due 2024 | EQT Midstream Partners LP
Debt Instrument
Principal	$ 200,000,000		200,000,000
Interest rate (as a percent)	4.00%
4.00% Senior Notes Due 2024 and 6.00% Senior Notes Due 2025 | EQT Midstream Partners LP
Debt Instrument
Principal	$ 500,000,000
Debt issuance costs			$ 509,000,000

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Debt - 2022 Tender Offers (Details) - USD ($)	3 Months Ended			9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	[1]	Sep. 30, 2023	Sep. 30, 2022		Jun. 14, 2022	Jun. 10, 2022	Jun. 09, 2022	Jun. 07, 2022
Debt Instrument
Loss on extinguishment of debt	$ 0	$ 0		$ 0	$ 24,937,000	[1],[2]
4.75% Senior Notes Due 2023 | Senior Notes | EQT Midstream Partners LP
Debt Instrument
Principal								$ 4,300,000	$ 496,800,000
Debt issuance costs								$ 4,400,000	$ 506,700,000
Loss on extinguishment of debt					$ 24,900,000
4.00% Senior Notes Due 2024 | Senior Notes | EQT Midstream Partners LP
Debt Instrument
Principal							$ 200,000,000			$ 200,000,000
6.00% Senior Notes Due 2025 | Senior Notes | EQT Midstream Partners LP
Debt Instrument
Principal							300,000,000			300,000,000
4.00% Senior Notes Due 2024 and 6.00% Senior Notes Due 2025 | Senior Notes | EQT Midstream Partners LP
Debt Instrument
Principal										$ 500,000,000
Debt issuance costs							$ 509,000,000

[1] Certain line items of the previously issued unaudited interim consolidated financial statements for the three and nine months ended September 30, 2022 have been revised. See Note 1 for more information.

[2] Certain line items of the previously issued unaudited interim consolidated financial statements for the nine months ended September 30, 2022 have been revised. See Note 1 for more information.

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Fair Value Measurements (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Gain (loss) on derivative instrument	$ (3.4)	$ (0.8)	$ 7.5	$ 4.5
EQM | Fair Value | Level 3 | EES
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Preferred interest	88.5		88.5		$ 95.2
EQM | Carrying Value | Level 3 | EES
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Preferred interest	90.0		90.0		94.3
Henry Hub Cash Payment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Derivative instrument, at fair value	30.4		30.4		$ 23.0
Henry Hub Cash Payment | Other Current Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Derivative instrument, at fair value	25.3		25.3
Henry Hub Cash Payment | Other Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Derivative instrument, at fair value	$ 5.1		$ 5.1
Market Quoted Volatility | Volatility
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Volatility rate (as a percent)	0.500		0.500

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Earnings Per Share (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Class of Stock
Potentially dilutive securities (in shares)		844	1,033	782
Phantom Share Units (PSUs)
Class of Stock
Incremental common shares attributable to dilutive effect of share-based payment arrangements (in shares)	819	567	723	599

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Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Effective tax rate (as a percent)	(9.20%)	0.10%	(4.90%)	(2.40%)
Unrecognized tax benefits	$ 1.2		$ 1.2
Unrecognized tax benefits that would impact effective tax rate			1.0
Unrecognized tax benefits, interest on income taxes expense			0.2
Income tax expense related to changes in valuation allowances			68.3
Valuation allowance	$ 88.4		$ 88.4		$ 156.7

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Subsequent Events (Details) - EQM Credit Facility - USD ($)	Oct. 06, 2023	Sep. 30, 2023	Dec. 31, 2022
Subsequent Event [Line Items]
Maximum borrowing capacity		$ 2,160,000,000
Subsequent Event
Subsequent Event [Line Items]
Maximum borrowing capacity	$ 2,160,000,000
EQM Midstream Partners, LP | Revolving Credit Facility
Subsequent Event [Line Items]
Borrowings outstanding		525,000,000	$ 240,000,000
EQM Midstream Partners, LP | Revolving Credit Facility | Subsequent Event
Subsequent Event [Line Items]
Borrowings outstanding	1,450,000,000
Line of Credit | Subsequent Event
Subsequent Event [Line Items]
Maximum borrowing capacity	$ 1,550,000,000
Line of Credit | EQM Midstream Partners, LP
Subsequent Event [Line Items]
Maximum borrowing capacity		$ 1,550,000,000