8-K

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) October 11, 2022

 _____________________________________________

MPLX LP

(Exact name of registrant as specified in its charter)

_____________________________________________

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: (419) 421-2414

_____________________________________________

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 class	Trading symbol(s)	Name of each exchange on which registered
Common Units Representing Limited Partnership Interests	MPLX	New 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 8.01 Other Events.

On October 11, 2022, Michael J. Hennigan, Chairman, President and Chief Executive Officer of MPLX GP LLC, issued a letter to colleagues and unitholders to provide an update on his health. A copy of his letter is attached as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits.

Exhibit Number	Description
99.1	Letter from Michael J. Hennigan, Chairman, President and Chief Executive Officer of MPLX GP LLC
104	Cover 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: October 11, 2022	By:	/s/ Molly R. Benson
		Name: Molly R. Benson
		Title: Vice President, Chief Securities, Governance & Compliance Officer and Corporate Secretary

EX-99.1

Exhibit 99.1

A MESSAGE FROM MICHAEL J. HENNIGAN

October 11, 2022

Dear Colleagues and Unitholders,

This past April, I shared with you that I had been diagnosed with throat cancer and would be undergoing treatment. Today, I want to share a very positive update. I completed the seven-week radiation and chemotherapy treatment protocol for this condition a few months ago. As is routine for this type of cancer, I recently underwent a series of tests and scans to determine the effectiveness of that treatment. I am very pleased to report that the results indicate no sign of cancer. While my prognosis is excellent and I am pleased to share this encouraging outcome with you, I will as a matter of course be monitored in the future.

I want to express my sincere thanks to all employees, as well as investors and business leaders, who offered their words of encouragement. It was very uplifting and I am extremely grateful.

I remain focused on the future and honored to lead MPLX LP. Thanks for your support.

Mike.

XML

Document and Entity Information	Oct. 11, 2022
Cover [Abstract]
Entity Central Index Key	0001552000
Amendment Flag	false
Document Type	8-K
Document Period End Date	Oct. 11, 2022
Entity Registrant Name	MPLX LP
Entity Incorporation, State or Country Code	DE
Entity File Number	001-35714
Entity Tax Identification Number	27-0005456
Entity Address, Address Line One	200 E. Hardin Street
Entity Address, City or Town	Findlay
Entity Address, State or Province	OH
Entity Address, Postal Zip Code	45840
City Area Code	419
Local Phone Number	421-2414
Written Communications	false
Soliciting Material	false
Pre-commencement Tender Offer	false
Pre-commencement Issuer Tender Offer	false
Title of 12(b) Security	Common Units Representing Limited Partnership Interests
Trading Symbol	MPLX
Security Exchange Name	NYSE
Entity Emerging Growth Company	false