Form 8-K





Washington, DC 20549







Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): November 15, 2013




(Exact name of Registrant as specified in its charter)




Delaware   001-35714   45-5010536
(State or other jurisdiction   (Commission   (IRS Employer
of incorporation)   File Number)   Identification Number)

200 E. Hardin Street

Findlay, Ohio 45840

(Address of principal executive offices, including zip code)

(419) 672-6500

(Registrant’s telephone number, including area code)



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))




Item 5.02. Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On November 15, 2013, Garry L. Peiffer, President and Director of MPLX GP LLC (the “General Partner”), the general partner of MPLX LP (the “Partnership”), notified the Partnership he will retire as President effective January 1, 2014. Mr. Peiffer will remain as a member of the Board of Directors of the General Partner. In light of Mr. Peiffer’s leadership and service to the Partnership as its President in its first full year of operations, the General Partner took action to accelerate the vesting of his unvested restricted phantom units that would otherwise be forfeited upon his retirement.


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.





By: MPLX GP LLC, its General Partner

Date: November 21, 2013     By:  

/s/ J. Michael Wilder

      Name: J. Michael Wilder
      Title: Vice President, General Counsel and Secretary