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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
_____________________________________________
FORM 8-K
_____________________________________________
CURRENT REPORT
Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
Date of Report (Date of earliest event reported) May 4, 2021
 _____________________________________________
MPLX LP
(Exact name of registrant as specified in its charter)
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Delaware 001-35714 27-0005456
(State or other jurisdiction
of incorporation)
 (Commission File Number) (IRS Employer
Identification No.)

200 E. Hardin Street, Findlay, Ohio 45840
(Address of principal executive offices) (Zip code)

Registrant’s telephone number, including area code: (419421-2414
_____________________________________________
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: 
Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:
Title of each classTrading
symbol(s)
Name of each exchange on which registered
Common Units Representing Limited Partnership InterestsMPLXNew York Stock Exchange
Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth 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.




Item 2.02Results of Operations and Financial Condition
On May 4, 2021, MPLX LP issued a press release announcing its financial results for the quarter ended March 31, 2021. The press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.

Information in this Item 2.02 and Exhibit 99.1 of Item 9.01 below shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise incorporated by reference into any filing pursuant to the Securities Act of 1933, as amended, or the Exchange Act except as otherwise expressly stated in such a filing.

Item 9.01Financial Statements and Exhibits
(d) Exhibits.

 
Exhibit Number
 Description
 Press Release issued by MPLX LP on May 4, 2021
104Cover Page Interactive Data File (embedded within the Inline XBRL document)




SIGNATURES
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 hereunto duly authorized.
 
MPLX LP
By:MPLX GP LLC, its General Partner
Date: May 4, 2021By:/s/ Pamela K. M. Beall
Name: Pamela K. M. Beall
Title: Executive Vice President and Chief Financial Officer