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MPLX LP

For the period ended Sep 30, 2025. Filed Nov 4, 2025.

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About this filing

A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.

Sep 30, 2025 · Filed Nov 4, 2025

MPLX$56.80+1.6%Stored close · as of Nov 9, 2026

Extracted filing text, with the paragraph anchors used by the comparison.

See the whole filing, with its images and exhibits

Table of Contents

Page
PART I – FINANCIAL INFORMATION
Item 1. · Financial Statements:
Consolidated Statements of Income (Unaudited)3
Consolidated Statements of Comprehensive Income (Unaudited)4
Consolidated Balance Sheets (Unaudited)5
Consolidated Statements of Cash Flows (Unaudited)6
Consolidated Statements of Equity and Series A Preferred Units (Unaudited)7
Notes to Consolidated Financial Statements (Unaudited)8
1. Description of the Business and Basis of Presentation8
2. Accounting Standards8
3. Acquisitions and Other Transactions8
4. Equity Method Investments12
5. Related Party Agreements and Transactions13
6. Equity14
7. Net Income Per Limited Partner Unit15
8. Segment Information16
9. Property, Plant and Equipment18
10. Fair Value Measurements18
11. Derivatives19
12. Debt20
13. Net Interest and Other Financial Costs21
14. Revenue22
15. Supplemental Cash Flow Information25
16. Commitments and Contingencies25
Item 2.Management’s Discussion and Analysis of Financial Condition and Results of Operations27
Item 3.Quantitative and Qualitative Disclosures about Market Risk48
Item 4.Controls and Procedures49
PART II – OTHER INFORMATION
Item 1.Legal Proceedings50
Item 1A.Risk Factors50
Item 2.Unregistered Sales of Equity Securities and Use of Proceeds50
Item 5.Other Information50
Item 6.Exhibits51
Signatures52

Unless otherwise stated or the context otherwise indicates, all references in this Form 10-Q to “MPLX LP,” “MPLX,” “the Partnership,” “us,” “our,” “we,” or like terms refer to MPLX LP and its consolidated subsidiaries. References to our sponsor and customer, “MPC,” refer collectively to Marathon Petroleum Corporation and its subsidiaries, other than the Partnership.

Glossary of Terms

The abbreviations, acronyms and industry terminology used in this report are defined as follows:

ANDXAndeavor Logistics LLC (formerly known as Andeavor Logistics LP), a wholly-owned subsidiary of the Partnership
ASCAccounting Standards Codification
ASUAccounting Standards Update
BarrelOne stock tank barrel, or 42 United States gallons of liquid volume, used in reference to crude oil or other liquid hydrocarbons
DCF (a non-GAAP financial measure)Distributable Cash Flow
EBITDA (a non-GAAP financial measure)Earnings Before Interest, Taxes, Depreciation and Amortization
FASBFinancial Accounting Standards Board
FCF (a non-GAAP financial measure)Free Cash Flow
GAAPAccounting principles generally accepted in the United States of America
MarkWestMarkWest Energy Partners, LP., a wholly-owned subsidiary of the Partnership
mbpdThousand barrels per day
MMBtuOne million British thermal units, an energy measurement
MMcf/dOne million cubic feet per day
NGLNatural gas liquids, such as ethane, propane, butanes and natural gasoline
SECUnited States Securities and Exchange Commission
SOFRSecured Overnight Financing Rate
VIEVariable interest entity
ContentsView on SEC.gov

The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.