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MPLX LP

For the period ended Mar 31, 2026. Filed May 5, 2026.

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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.

Mar 31, 2026 · Filed May 5, 2026

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 Investments11
5. Related Party Agreements and Transactions11
6. Equity13
7. Net Income Per Limited Partner Unit14
8. Segment Information14
9. Property, Plant and Equipment16
10. Fair Value Measurements16
11. Derivatives17
12. Debt18
13. Net Interest and Other Financial Costs19
14. Revenue19
15. Supplemental Cash Flow Information21
16. Commitments and Contingencies21
Item 2.Management’s Discussion and Analysis of Financial Condition and Results of Operations23
Item 3.Quantitative and Qualitative Disclosures about Market Risk41
Item 4.Controls and Procedures42
PART II – OTHER INFORMATION
Item 1.Legal Proceedings43
Item 1A.Risk Factors43
Item 2.Unregistered Sales of Equity Securities and Use of Proceeds43
Item 5.Other Information43
Item 6.Exhibits44
Signatures45

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
GAAPAccounting principles generally accepted in the United States of America
MarkWestMarkWest Energy Partners LLC (formerly known as MarkWest 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.