<SEC-DOCUMENT>0001552000-18-000027.txt : 20180312
<SEC-HEADER>0001552000-18-000027.hdr.sgml : 20180312
<ACCEPTANCE-DATETIME>20180312165735
ACCESSION NUMBER:		0001552000-18-000027
CONFORMED SUBMISSION TYPE:	S-8
PUBLIC DOCUMENT COUNT:		4
FILED AS OF DATE:		20180312
DATE AS OF CHANGE:		20180312
EFFECTIVENESS DATE:		20180312

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MPLX LP
		CENTRAL INDEX KEY:			0001552000
		STANDARD INDUSTRIAL CLASSIFICATION:	PIPE LINES (NO NATURAL GAS) [4610]
		IRS NUMBER:				270005456
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		S-8
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-223599
		FILM NUMBER:		18684145

	BUSINESS ADDRESS:	
		STREET 1:		200 E. HARDIN STREET
		CITY:			FINDLAY
		STATE:			OH
		ZIP:			45840
		BUSINESS PHONE:		(419) 421-2159

	MAIL ADDRESS:	
		STREET 1:		200 E. HARDIN STREET
		CITY:			FINDLAY
		STATE:			OH
		ZIP:			45840
</SEC-HEADER>
<DOCUMENT>
<TYPE>S-8
<SEQUENCE>1
<FILENAME>mplxs-8icp2018.htm
<DESCRIPTION>S-8
<TEXT>
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<div><a name="s7064e290bdf54c579df907e462cb1340"></a></div><div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></div><div><br></div><div style="line-height:120%;text-align:center;-sec-extract:summary;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;margin-left:auto;margin-right:auto;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="3"></td></tr><tr><td style="width:16%;"></td><td style="width:67%;"></td><td style="width:17%;"></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">As filed with the Securities and Exchange Commission on March 12, 2018</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Registration No.&#160;333-</font></div></td></tr></table></div></div><div style="line-height:120%;text-align:center;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;"><br></font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="1"></td></tr><tr><td style="width:100%;"></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr></table></div></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:120%;text-align:center;font-size:14pt;"><font style="font-family:inherit;font-size:14pt;font-weight:bold;">UNITED STATES</font></div><div style="line-height:120%;text-align:center;font-size:14pt;"><font style="font-family:inherit;font-size:14pt;font-weight:bold;">SECURITIES AND EXCHANGE COMMISSION</font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Washington, DC 20549</font></div><div style="line-height:120%;text-align:left;font-size:4.5pt;"><font style="font-family:inherit;font-size:4.5pt;">&#160;</font></div><div style="line-height:120%;padding-bottom:1px;text-align:center;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;margin-left:auto;margin-right:auto;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="1"></td></tr><tr><td style="width:100%;"></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr></table></div></div><div style="line-height:120%;padding-top:5px;text-align:center;font-size:14pt;"><font style="font-family:inherit;font-size:14pt;font-weight:bold;">FORM S-8</font></div><div style="line-height:120%;text-align:center;font-size:14pt;"><font style="font-family:inherit;font-size:14pt;font-weight:bold;">REGISTRATION STATEMENT</font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">UNDER</font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">THE SECURITIES ACT OF 1933</font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="1"></td></tr><tr><td style="width:100%;"></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr></table></div></div><div style="line-height:120%;padding-top:5px;text-align:center;font-size:17pt;"><font style="font-family:inherit;font-size:17pt;font-weight:bold;">MPLX LP</font></div><div style="line-height:120%;text-align:center;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;font-weight:bold;">(Exact name of Registrant as specified in its charter)</font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="1"></td></tr><tr><td style="width:100%;"></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr></table></div></div><div style="line-height:120%;text-align:left;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;">&#160;</font></div><div style="line-height:120%;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="3"></td></tr><tr><td style="width:51%;"></td><td style="width:1%;"></td><td style="width:48%;"></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Delaware</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">27-0005456</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">(State or other jurisdiction</font></div><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">of incorporation or organization)</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">(I.R.S. Employer</font></div><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Identification No.)</font></div></td></tr></table></div></div><div style="line-height:120%;padding-top:13px;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">200 E. Hardin Street</font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Findlay, Ohio 45840</font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">(Address of principal executive offices, including zip code)</font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="1"></td></tr><tr><td style="width:100%;"></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr></table></div></div><div style="line-height:120%;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;"><br></font></div><div style="line-height:120%;padding-top:5px;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">MPLX LP 2018 Incentive Compensation Plan</font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">(Full title of the plan)</font></div><div style="line-height:120%;padding-top:13px;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Molly R. Benson</font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Vice President, Corporate Secretary and Chief Compliance Officer</font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">200 E. Hardin Street</font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Findlay, Ohio 45840</font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">(Name and address of agent for service)</font></div><div style="line-height:120%;padding-top:13px;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">419-421-2414</font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">(Telephone number, including area code, of agent for service)</font></div><div style="line-height:120%;text-align:left;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;">&#160;</font></div><div style="line-height:120%;padding-bottom:1px;text-align:center;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;margin-left:auto;margin-right:auto;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="1"></td></tr><tr><td style="width:100%;"></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr></table></div></div><div style="line-height:120%;padding-top:13px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. 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style="overflow:hidden;height:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Large&#160;accelerated&#160;filer</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:Wingdings;font-size:10pt;">x</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Accelerated&#160;filer</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:right;font-size:10pt;"><font style="font-family:Wingdings;font-size:10pt;">&#168;</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Non-accelerated filer</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="font-size:10pt;"><font style="font-family:Wingdings;font-size:10pt;">&#168;</font><font style="font-family:inherit;font-size:10pt;">&#160;&#160;(Do not check if a smaller reporting company)</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Smaller&#160;reporting&#160;company</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:right;font-size:10pt;"><font style="font-family:Wingdings;font-size:10pt;">&#168;</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Emerging growth company</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td 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style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">(1)</font></div></td><td colspan="9" style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Consists of common units representing limited partner interests (&#8220;</font><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Common Units</font><font style="font-family:inherit;font-size:10pt;">&#8221;) issuable pursuant to the MPLX LP 2018 Incentive Compensation Plan (the &#8220;</font><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Plan</font><font style="font-family:inherit;font-size:10pt;">&#8221;), including Common Units issuable pursuant to the unit counting provisions of the Plan upon the cancellation, expiration, forfeiture or other termination of awards.</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">(2)</font></div></td><td colspan="9" style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Pursuant to Rule 416(a) under the Securities Act of 1933, as amended (the &#8220;</font><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Securities Act</font><font style="font-family:inherit;font-size:10pt;">&#8221;), this Registration Statement also covers such additional Common Units as may become issuable pursuant to the anti-dilution adjustment provisions of the Plan.</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">(3)</font></div></td><td colspan="9" style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Estimated solely for the purposes of determining the amount of the registration fee in accordance with Rule 457(c) and 457(h) of the Securities Act on the basis of the average of the high and low sale prices for the Common Units as reported on the New York Stock Exchange on March 8, 2018. </font></div></td></tr></table></div></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div><br></div><div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></div><hr style="page-break-after:always"><div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></div><div><br></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">PART II</font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">INFORMATION REQUIRED IN THE REGISTRATION STATEMENT</font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:120%;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" 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The following documents, which are on file with the Commission, are incorporated into this Registration Statement by reference:</font></div><div style="line-height:120%;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="3"></td></tr><tr><td style="width:4%;"></td><td style="width:4%;"></td><td style="width:92%;"></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">(a)</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The Registrant&#8217;s Annual Report on Form 10-K for the fiscal year ended December 31, 2017 (Commission File No. 001-35714);</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">(b)</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The Registrant&#8217;s Current Reports on Form 8-K filed on January 4, 2018, January 8, 2018 (Items 5.03 and 9.01 only), February 2, 2018, February 8, 2018 and March 5, 2018 (Commission File No. 001-35714); and</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">(c)</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The description of the Common Units contained in the Registrant&#8217;s Registration Statement on Form 8-A (File No.&#160;001-35714) filed with the Commission on October&#160;23, 2012 pursuant to Section&#160;12(b) of the Exchange Act, including any amendment or report filed for the purpose of updating such description.</font></div></td></tr></table></div></div><div style="line-height:120%;padding-top:8px;text-align:left;text-indent:48px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">All documents filed by the Registrant with the Commission pursuant to Sections 13(a), 13(c), 14 and 15(d) of the Exchange Act (excluding information deemed to be furnished and not filed with the Commission) subsequent to the date of this Registration Statement and prior to the filing of a post-effective amendment that indicates that all securities offered have been sold or that deregisters all securities then remaining unsold, will be deemed to be incorporated by reference in this Registration Statement and to be part hereof from the date of filing of such documents. Any statement contained in any document incorporated or deemed to be incorporated by reference herein will be deemed to be modified or superseded for purposes of this Registration Statement to the extent that a statement contained herein or in any other subsequently filed document which also is or is deemed to be incorporated by reference herein modifies or supersedes such statement. Any such statement so modified or superseded will not be deemed, except as modified or superseded, to constitute a part of this Registration Statement.</font></div><div style="line-height:120%;text-align:left;text-indent:0px;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:58.88888888888889%;border-collapse:collapse;text-align:left;"><tr><td colspan="2"></td></tr><tr><td style="width:11%;"></td><td style="width:89%;"></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Item&#160;4.</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Description of Securities.</font></div></td></tr></table></div></div><div style="line-height:120%;padding-top:5px;text-align:left;text-indent:48px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Not applicable.</font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:58.88888888888889%;border-collapse:collapse;text-align:left;"><tr><td colspan="2"></td></tr><tr><td style="width:11%;"></td><td style="width:89%;"></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Item&#160;5.</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Interests of Named Experts and Counsel.</font></div></td></tr></table></div></div><div style="line-height:120%;padding-top:5px;text-align:left;text-indent:48px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Not applicable.</font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:58.88888888888889%;border-collapse:collapse;text-align:left;"><tr><td colspan="2"></td></tr><tr><td style="width:11%;"></td><td style="width:89%;"></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Item&#160;6.</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Indemnification of Directors and Officers.</font></div></td></tr></table></div></div><div style="line-height:120%;padding-top:8px;text-align:left;text-indent:48px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Section&#160;7.7(a) of the Registrant&#8217;s Fourth Amended and Restated Agreement of Limited Partnership, dated as of February 1, 2018 (the &#8220;</font><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Partnership Agreement</font><font style="font-family:inherit;font-size:10pt;">&#8221;), filed as Exhibit 3.1 to this Registration Statement, provides that the Registrant will indemnify and hold harmless the following persons (each, an &#8220;</font><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Indemnitee</font><font style="font-family:inherit;font-size:10pt;">&#8221;), to the fullest extent permitted by law, from and against all losses, claims, damages, liabilities, joint or several, expenses (including legal fees and expenses), judgments, fines, penalties, interest, settlements or other amounts arising from any and all threatened, pending or completed claims, demands, actions, suits or proceedings, whether civil, criminal, administrative or investigative, and whether formal or informal and including appeals, in which any such person is involved, or threatened to be involved, as a party of otherwise, by reason of such person&#8217;s status with respect to the Registrant and acting (or refraining to act) in such capacity:</font></div><div style="line-height:120%;font-size:10pt;"><div 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style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#8226;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">any person who is or was serving at the request of the General Partner or any departing general partner of the Registrant or any of their respective affiliates as an officer, director, managing member, manager, general partner, fiduciary or trustee of another person owing a fiduciary duty to the Registrant or any of its subsidiaries, provided that a person shall not be an Indemnitee for purposes of the Partnership Agreement by reason of providing, on a fee-for-services basis, trustee, fiduciary or custodial services; and</font></div></td></tr></table></div><font style="font-family:inherit;font-size:10pt;">&#160;</font></div><div style="line-height:120%;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:99.07407407407408%;border-collapse:collapse;text-align:left;"><tr><td colspan="3"></td></tr><tr><td style="width:5%;"></td><td style="width:5%;"></td><td style="width:90%;"></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#8226;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">any person the General Partner designates as an Indemnitee because such person&#8217;s status, service or relationship exposes such person to claims or suits relating to the business and affairs of the Registrant and its subsidiaries.</font></div></td></tr></table></div></div><div><br></div><div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></div><hr style="page-break-after:always"><div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></div><div><br></div><div style="line-height:120%;padding-bottom:8px;padding-top:8px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;">Provided</font><font style="font-family:inherit;font-size:10pt;">, that no Indemnitee will be indemnified and held harmless pursuant to the Partnership Agreement if there has been a final non-appealable judgment entered by a court of competent jurisdiction determining that such Indemnitee, in respect of the matter for which such Indemnitee is seeking indemnification under the Partnership Agreement, acted in bad faith or engaged in intentional fraud, willful misconduct, or with respect to any criminal matter, acted with knowledge that such Indemnitee&#8217;s conduct was unlawful.</font></div><div style="line-height:120%;padding-top:8px;text-align:left;text-indent:48px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Any indemnification described above will be made only out of the Registrant&#8217;s assets. Unless the General Partner otherwise agrees, the General Partner will not be personally liable for such indemnification, or have any obligation to contribute or loan funds or assets to the Registrant to enable the Registrant to effectuate such indemnification.</font></div><div style="line-height:120%;padding-bottom:8px;padding-top:8px;text-align:left;text-indent:48px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Section&#160;7.7(b) of the Partnership Agreement states that, to the fullest extent permitted by law, expenses (including legal fees and expenses) incurred by an Indemnitee who is indemnified pursuant to Section 7.7(a) of the Partnership Agreement in defending any claim, demand, action, suit or proceeding shall, from time to time, be advanced by the Registrant, prior to a final and non-appealable judgment entered by a court of competent jurisdiction determining that the Indemnitee is not entitled to be indemnified in respect of the matter for which the Indemnitee is seeking indemnification, upon receipt by the Registrant of any undertaking by or on behalf of the Indemnitee to repay such amount if it shall be determined that the Indemnitee is not entitled to be indemnified as authorized by Section&#160;7.7 of the Partnership Agreement.</font></div><div style="line-height:120%;padding-bottom:8px;padding-top:8px;text-align:left;text-indent:48px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Section&#160;7.7(d) of the Partnership Agreement states that the Registrant may purchase and maintain (or reimburse the General Partner or its affiliates for the cost of) insurance, on behalf of the General Partner, its affiliates and such other persons as the General Partner shall determine, against any liabilities that may be asserted against, or expenses that may be incurred by, such person in connection with the Registrant&#8217;s activities or such person&#8217;s activities on behalf of the Registrant, regardless of whether the Registrant would have the power to indemnify such person against such liabilities under the Partnership Agreement. As of the date of this Registration Statement, the General Partner maintains directors and officers liability insurance for the benefit of its directors and officers.</font></div><div style="line-height:120%;padding-top:8px;text-align:left;text-indent:48px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The second amended and restated limited liability company agreement of the General Partner provides that the General Partner will indemnify and hold harmless the following persons under circumstances similar to those for which an Indemnitee would be entitled to indemnity under the Partnership: (i)&#160;MPC Investment LLC, as the initial member of the General Partner, and any person later admitted to the General Partner as a member; (ii)&#160;any person who is or was an affiliate of the General Partner (other than the Registrant and its subsidiaries); (iii)&#160;any person who is or was a member, partner, director, officer, fiduciary or trustee of the General Partner or its affiliates (other than the Registrant and its subsidiaries); (iv)&#160;any person who is or was serving at the request of the General Partner or its affiliates as an officer, director, member, manager, partner, fiduciary or trustee of another person; provided, however, that a person shall not be entitled to indemnification solely by reason of providing, on a fee-for-services basis, trustee, fiduciary or custodial services; and (v)&#160;any person designated by the board of directors of the General Partner.</font></div><div style="line-height:120%;padding-top:8px;text-align:left;text-indent:48px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Subject to the limitations set forth in the Partnership Agreement, Section&#160;17-108 of the Delaware Revised Uniform Limited Partnership Act empowers a Delaware limited partnership to indemnify and hold harmless any partner or other persons from and against all claims and demands whatsoever.</font></div><div 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style="line-height:120%;padding-top:5px;text-align:left;text-indent:48px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Not applicable.</font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:58.88888888888889%;border-collapse:collapse;text-align:left;"><tr><td colspan="2"></td></tr><tr><td style="width:11%;"></td><td style="width:89%;"></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Item&#160;8.</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Exhibits.</font></div></td></tr></table></div></div><div style="line-height:120%;text-align:left;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="4"></td></tr><tr><td style="width:10%;"></td><td style="width:1%;"></td><td style="width:1%;"></td><td style="width:88%;"></td></tr><tr><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Exhibit No.</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Description</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:10pt;"><a style="text-decoration:underline;color:#0000FF;-sec-extract:exhibit;" href="http://www.sec.gov/Archives/edgar/data/1552000/000119312512292127/d368024dex31.htm"><font style="font-family:inherit;font-size:10pt;">4.1</font></a></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><a style="text-decoration:underline;color:#0000FF;-sec-extract:exhibit;" href="http://www.sec.gov/Archives/edgar/data/1552000/000119312512292127/d368024dex31.htm"><font style="font-family:inherit;font-size:10pt;">Certificate of Limited Partnership of MPLX LP (incorporated by reference to Exhibit 3.1 to the Registrant&#8217;s Registration Statement on Form S-1 (File No. 333-182500) filed by the Registrant on July 2, 2012, as amended on August 10, 2012, September 7, 2012, October 9, 2012 and October 18, 2012).</font></a></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:10pt;"><a style="text-decoration:underline;color:#0000FF;-sec-extract:exhibit;" href="http://www.sec.gov/Archives/edgar/data/1552000/000119312512417936/d368024dex32.htm"><font style="font-family:inherit;font-size:10pt;">4.2</font></a></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><a style="text-decoration:underline;color:#0000FF;-sec-extract:exhibit;" href="http://www.sec.gov/Archives/edgar/data/1552000/000119312512417936/d368024dex32.htm"><font style="font-family:inherit;font-size:10pt;">Amendment to the Certificate of Limited Partnership of MPLX LP (incorporated by reference to Exhibit&#160;3.2 to the Registrant&#8217;s Registration Statement on Form S-1 (File No. 333-182500), filed by the Registrant on July 2, 2012, as amended on August 10, 2012, September 7, 2012, October 9, 2012 and October 18, 2012).</font></a></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:10pt;"><a style="text-decoration:underline;color:#0000FF;-sec-extract:exhibit;" href="http://www.sec.gov/Archives/edgar/data/1552000/000155200018000018/ex31amendedagreement.htm"><font style="font-family:inherit;font-size:10pt;">4.3</font></a></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><a style="text-decoration:underline;color:#0000FF;-sec-extract:exhibit;" href="http://www.sec.gov/Archives/edgar/data/1552000/000155200018000018/ex31amendedagreement.htm"><font style="font-family:inherit;font-size:10pt;">Fourth Amended and Restated Agreement of Limited Partnership, dated as of February 1, 2018 (incorporated by reference to Exhibit 3.1 to the Registrant&#8217;s Current Report on Form 8-K 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style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><a style="text-decoration:underline;color:#0000FF;-sec-extract:exhibit;" href="http://www.sec.gov/Archives/edgar/data/1552000/000155200018000023/mplx2018icp.htm"><font style="font-family:inherit;font-size:10pt;">MPLX LP 2018 Incentive Compensation Plan (incorporated by reference to Exhibit 10.1 to the Registrant&#8217;s Current Report on Form 8-K (File No. 001-35714) filed by the Registrant on March 5, 2018).</font></a></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;&#160;</font><a style="text-decoration:underline;color:#0000FF;-sec-extract:exhibit;" href="ex51.htm"><font style="font-family:inherit;font-size:10pt;">5.1*</font></a></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><a style="text-decoration:underline;color:#0000FF;-sec-extract:exhibit;" href="ex51.htm"><font style="font-family:inherit;font-size:10pt;">Opinion of Jones Day.</font></a></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="padding-bottom:5px;padding-top:1px;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font><a style="text-decoration:underline;color:#0000FF;-sec-extract:exhibit;" href="ex231.htm"><font style="font-family:inherit;font-size:10pt;">23.1*</font></a></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:1px;"><div style="padding-bottom:5px;text-align:left;padding-left:1px;font-size:10pt;"><a style="text-decoration:underline;color:#0000FF;-sec-extract:exhibit;" href="ex231.htm"><font 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style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:1px;"><div style="padding-bottom:5px;text-align:left;font-size:10pt;"><a style="text-decoration:underline;color:#0000FF;-sec-extract:exhibit;" href="ex51.htm"><font style="font-family:inherit;font-size:10pt;">Consent of Jones Day (included in Exhibit 5.1). </font></a></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font><a style="text-decoration:underline;color:#0000FF;-sec-extract:exhibit;" href="exhibit241.htm"><font style="font-family:inherit;font-size:10pt;">24.1*</font></a></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><a style="text-decoration:underline;color:#0000FF;-sec-extract:exhibit;" href="exhibit241.htm"><font style="font-family:inherit;font-size:10pt;">Powers of Attorney. </font></a></div></td></tr></table></div></div><div style="line-height:120%;text-align:left;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:58.88888888888889%;border-collapse:collapse;text-align:left;"><tr><td colspan="2"></td></tr><tr><td style="width:3%;"></td><td style="width:97%;"></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">*</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Filed herewith.</font></div></td></tr></table></div></div><div><br></div><div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></div><hr style="page-break-after:always"><div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></div><div><br></div><div style="line-height:120%;text-align:left;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:58.88888888888889%;border-collapse:collapse;text-align:left;"><tr><td colspan="2"></td></tr><tr><td style="width:11%;"></td><td style="width:89%;"></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Item&#160;9.</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Undertakings. </font></div></td></tr></table></div></div><table cellpadding="0" cellspacing="0" style="padding-top:5px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:72px;"></td><td></td></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:10pt;padding-left:48px;"><font style="font-family:inherit;font-size:10pt;">(a) </font></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The undersigned Registrant hereby undertakes:</font></div></td></tr></table><table cellpadding="0" cellspacing="0" style="padding-top:5px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:96px;"></td><td></td></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:10pt;padding-left:72px;"><font style="font-family:inherit;font-size:10pt;">(1) </font></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">To file, during any period in which offers or sales are being made, a post-effective amendment to this Registration Statement:</font></div></td></tr></table><table cellpadding="0" cellspacing="0" style="padding-top:5px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:120px;"></td><td></td></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:10pt;padding-left:96px;"><font style="font-family:inherit;font-size:10pt;">(i) </font></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">To include any prospectus required by Section&#160;10(a)(3) of the Securities Act;</font></div></td></tr></table><table cellpadding="0" cellspacing="0" style="padding-top:5px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:120px;"></td><td></td></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:10pt;padding-left:96px;"><font style="font-family:inherit;font-size:10pt;">(ii) </font></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">To reflect in the prospectus any facts or events arising after the effective date of the Registration Statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in the Registration Statement. Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the total dollar value of securities offered would not exceed that which was registered) and any deviation from the low or high end of the estimated maximum offering range may be reflected in the form of a prospectus filed with the Commission pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price represent no more than 20 percent change in the maximum aggregate offering price set forth in the &#8220;Calculation of Registration Fee&#8221; table in the effective Registration Statement; and</font></div></td></tr></table><table cellpadding="0" cellspacing="0" style="padding-top:5px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:120px;"></td><td></td></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:10pt;padding-left:96px;"><font style="font-family:inherit;font-size:10pt;">(iii) </font></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">To include any material information with respect to the plan of distribution not previously disclosed in the Registration Statement or any material change to such information in the Registration Statement;</font></div></td></tr></table><div style="line-height:120%;padding-top:13px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;">Provided, however</font><font style="font-family:inherit;font-size:10pt;">, that paragraphs (a)(1)(i) and (a)(1)(ii) do not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in reports filed with or furnished to the Commission by the Registrant pursuant to Section&#160;13 or Section&#160;15(d) of the Exchange Act that are incorporated by reference in the Registration Statement.</font></div><table cellpadding="0" cellspacing="0" style="padding-top:5px;font-family:Times New Roman; 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In the event that a claim for indemnification against such liabilities (other than the payment by the Registrant of expenses incurred or paid by a director, officer or controlling person of the Registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the Registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Securities Act and will be governed by the final adjudication of such issue.</font></div><div><br></div><div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></div><hr style="page-break-after:always"><div><div style="line-height:120%;font-size:10pt;"><font 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has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Findlay, State of Ohio, on March 12, 2018.</font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div><div style="line-height:120%;text-align:right;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;text-align:-moz-right;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:41.48148148148148%;border-collapse:collapse;text-align:left;margin-left:auto;margin-right:0;"><tr><td colspan="3"></td></tr><tr><td style="width:14%;"></td><td style="width:4%;"></td><td style="width:82%;"></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr><tr><td colspan="3" style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">MPLX LP</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">By:</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">MPLX GP LLC, its General Partner</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr><tr><td 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#000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">/s/ Gary R. Heminger</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Gary R. Heminger</font></div><div style="font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Chairman of the Board and </font></div><div style="font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Chief Executive Officer </font></div></td></tr></table></div></div><div style="line-height:120%;text-align:left;text-indent:48px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div><div style="line-height:120%;text-align:left;text-indent:48px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Pursuant to the requirements of the Securities Act of 1933, this Registration Statement has been signed by the following persons in the capacities indicated on March 12, 2018. </font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;margin-left:auto;margin-right:auto;width:96.29629629629629%;border-collapse:collapse;text-align:left;"><tr><td colspan="4"></td></tr><tr><td style="width:39%;"></td><td style="width:2%;"></td><td style="width:2%;"></td><td style="width:57%;"></td></tr><tr><td colspan="4" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr><tr><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr><tr><td colspan="2" style="vertical-align:top;padding-left:2px;padding-top:1px;padding-bottom:9px;padding-right:1px;"><div style="padding-bottom:9px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Signature</font></div></td><td colspan="2" style="vertical-align:top;padding-left:2px;padding-top:1px;padding-bottom:9px;padding-right:1px;"><div style="padding-bottom:9px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Title</font></div></td></tr><tr><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:1px;padding-bottom:1px;padding-right:1px;"><div style="padding-bottom:1px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">/s/ Gary R. 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Hennigan</font></div></td></tr><tr><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:1px;padding-bottom:1px;padding-right:1px;"><div style="padding-bottom:1px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">*</font></div></td><td colspan="2" rowspan="2" style="vertical-align:middle;padding-left:2px;padding-top:1px;padding-bottom:9px;padding-right:1px;"><div style="padding-bottom:9px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Director of MPLX GP LLC</font></div></td></tr><tr><td colspan="2" style="vertical-align:middle;padding-left:2px;padding-top:1px;padding-bottom:1px;padding-right:1px;border-top:1px solid #000000;"><div style="padding-bottom:1px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Michael L. Beatty</font></div></td></tr><tr><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:1px;padding-bottom:1px;padding-right:1px;"><div style="padding-bottom:1px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">*</font></div></td><td colspan="2" rowspan="2" style="vertical-align:middle;padding-left:2px;padding-top:1px;padding-bottom:9px;padding-right:1px;"><div style="padding-bottom:9px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Director of MPLX GP LLC</font></div></td></tr><tr><td colspan="2" style="vertical-align:middle;padding-left:2px;padding-top:1px;padding-bottom:1px;padding-right:1px;border-top:1px solid #000000;"><div style="padding-bottom:1px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">David A. Daberko</font></div></td></tr><tr><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:1px;padding-bottom:1px;padding-right:1px;"><div style="padding-bottom:1px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">*</font></div></td><td colspan="2" rowspan="2" style="vertical-align:middle;padding-left:2px;padding-top:1px;padding-bottom:9px;padding-right:1px;"><div style="padding-bottom:9px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Director of MPLX GP LLC</font></div></td></tr><tr><td colspan="2" style="vertical-align:middle;padding-left:2px;padding-top:1px;padding-bottom:1px;padding-right:1px;border-top:1px solid #000000;"><div style="padding-bottom:1px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Timothy T. Griffith</font></div></td></tr><tr><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:1px;padding-bottom:1px;padding-right:1px;"><div style="padding-bottom:1px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">*</font></div></td><td colspan="2" rowspan="2" style="vertical-align:middle;padding-left:2px;padding-top:1px;padding-bottom:9px;padding-right:1px;"><div style="padding-bottom:9px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Director of MPLX GP LLC</font></div></td></tr><tr><td colspan="2" style="vertical-align:middle;padding-left:2px;padding-top:1px;padding-bottom:1px;padding-right:1px;border-top:1px solid #000000;"><div style="padding-bottom:1px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Christopher A. Helms</font></div></td></tr><tr><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:1px;padding-bottom:1px;padding-right:1px;"><div style="padding-bottom:1px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">*</font></div></td><td colspan="2" rowspan="2" style="vertical-align:middle;padding-left:2px;padding-top:1px;padding-bottom:9px;padding-right:1px;"><div style="padding-bottom:9px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Director of MPLX GP LLC</font></div></td></tr><tr><td colspan="2" style="vertical-align:middle;padding-left:2px;padding-top:1px;padding-bottom:1px;padding-right:1px;border-top:1px solid #000000;"><div style="padding-bottom:1px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Garry L. Peiffer</font></div></td></tr><tr><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:1px;padding-bottom:1px;padding-right:1px;"><div style="padding-bottom:1px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">*</font></div></td><td colspan="2" rowspan="2" style="vertical-align:middle;padding-left:2px;padding-top:1px;padding-bottom:9px;padding-right:1px;"><div style="padding-bottom:9px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Director of MPLX GP LLC</font></div></td></tr><tr><td colspan="2" style="vertical-align:middle;padding-left:2px;padding-top:1px;padding-bottom:1px;padding-right:1px;border-top:1px solid #000000;"><div style="padding-bottom:1px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Dan D. Sandman</font></div></td></tr><tr><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:1px;padding-bottom:1px;padding-right:1px;"><div style="padding-bottom:1px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">*</font></div></td><td colspan="2" rowspan="2" style="vertical-align:middle;padding-left:2px;padding-top:1px;padding-bottom:9px;padding-right:1px;"><div style="padding-bottom:9px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Director of MPLX GP LLC</font></div></td></tr><tr><td colspan="2" style="vertical-align:middle;padding-left:2px;padding-top:1px;padding-bottom:1px;padding-right:1px;border-top:1px solid #000000;"><div style="padding-bottom:1px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Frank M. 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Templin</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr></table></div></div><div><br></div><div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></div><hr style="page-break-after:always"><div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></div><div><br></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman; font-size:10pt;"><tr><td style="width:24px;"></td><td></td></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:10pt;padding-left:0px;"><font style="font-family:inherit;font-size:10pt;">*</font></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">This Registration Statement has been signed on behalf of the above directors and/or officers by Gary R. 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Heminger</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Gary R. Heminger</font></div><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Attorney-in-Fact</font></div></td></tr></table></div></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div><br></div><div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></div>	</body>
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<TYPE>EX-5.1
<SEQUENCE>2
<FILENAME>ex51.htm
<DESCRIPTION>EXHIBIT 5.1
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<div><a name="s7f5f4b4a2d3a4f139094a05d5662f493"></a></div><div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></div><div><br></div><div style="line-height:120%;text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;"><br></font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:120%;text-align:left;font-size:6.5pt;"><font style="font-family:inherit;font-size:6.5pt;">&#160;</font></div><div style="line-height:120%;text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Exhibit 5.1</font></div><div style="line-height:120%;padding-top:18px;text-align:center;font-size:14pt;"><font style="font-family:inherit;font-size:14pt;">JONES DAY</font></div><div style="line-height:120%;padding-top:5px;text-align:center;font-size:6.5pt;"><font style="font-family:inherit;font-size:6.5pt;">North Point</font><font style="font-family:Arial;font-size:6.5pt;">&#32;</font><font style="font-family:Wingdings;font-size:4pt;">l</font><font style="font-family:inherit;font-size:6.5pt;">&#32;901 Lakeside Avenue</font><font style="font-family:Arial;font-size:6.5pt;">&#32;</font><font style="font-family:Wingdings;font-size:4pt;">l</font><font style="font-family:inherit;font-size:6.5pt;">&#32;Cleveland, Ohio 44114.1190</font></div><div style="line-height:120%;text-align:center;font-size:6.5pt;"><font style="font-family:inherit;font-size:6.5pt;">TELEPHONE: +1.216.586.3939</font><font style="font-family:Arial;font-size:6.5pt;">&#32;</font><font style="font-family:Wingdings;font-size:4pt;">l</font><font style="font-family:inherit;font-size:6.5pt;">&#32;FACSIMILE: +1.216.579.0212</font></div><div style="line-height:120%;padding-top:13px;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">March 12, 2018</font></div><div style="line-height:120%;padding-top:13px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">MPLX LP</font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">200 E. Hardin Street</font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Findlay, Ohio 45840</font></div><div style="line-height:120%;padding-top:13px;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Re: </font><font style="font-family:inherit;font-size:10pt;text-decoration:underline;">Registration Statement on Form S-8 Filed by MPLX LP</font></div><div style="line-height:120%;padding-top:13px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Ladies and Gentlemen:</font></div><div style="line-height:120%;padding-top:5px;text-align:left;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">We have acted as counsel for MPLX LP, a Delaware limited partnership (the &#8220;</font><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Partnership</font><font style="font-family:inherit;font-size:10pt;">&#8221;), in connection with the MPLX LP 2018 Incentive Compensation Plan (the &#8220;</font><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Plan</font><font style="font-family:inherit;font-size:10pt;">&#8221;). In connection with the opinion expressed herein, we have examined such documents, records and matters of law as we have deemed relevant or necessary for purposes of such opinion. Based on the foregoing, and subject to the further limitations, qualifications and assumptions set forth herein, we are of the opinion that the 16,000,000 common units representing limited partner interests (the &#8220;</font><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Common Units</font><font style="font-family:inherit;font-size:10pt;">&#8221;) in the Partnership that may be issued or delivered and sold pursuant to the Plan and the authorized instruments that govern awards under the Plan to which the Common Units relate (the &#8220;</font><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Award Agreements</font><font style="font-family:inherit;font-size:10pt;">&#8221;) have been duly authorized by all necessary limited partnership action of the Partnership and, when issued or delivered and sold in accordance with the Plan and the Award Agreements, will be validly issued, fully paid and nonassessable, except as such nonassessability may be limited by Sections 17-303, 17-607 and 17-804 of the Delaware Revised Uniform Limited Partnership Act or within the Partnership&#8217;s partnership agreement.</font></div><div style="line-height:120%;padding-top:13px;text-align:left;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The opinion expressed herein is limited to the Delaware Revised Uniform Limited Partnership Act, as currently in effect, and we express no opinion as to the effect of the laws of any other jurisdiction. In addition, we have assumed that the authorization of the Partnership to issue or deliver and sell the Common Units pursuant to the Plan and the applicable Award Agreements will be in full force and effect at all times at which such Common Units are issued or delivered and sold by the Partnership, and the Partnership will take no action inconsistent with such authorization.</font></div><div style="line-height:120%;padding-top:13px;text-align:left;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">In rendering the opinion above, we have assumed that each award under the Plan will be approved by all necessary limited partnership action of the Partnership, and that the Common Units underlying each award under the Plan will be issued or delivered and sold by the Partnership against payment therefor in the circumstances contemplated by the Plan.</font></div><div style="line-height:120%;padding-top:13px;text-align:left;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">We hereby consent to the filing of this opinion as Exhibit 5.1 to the Registration Statement on Form S-8 filed by the Partnership to effect registration of the Common Units to be issued or delivered and sold pursuant to the Plan under the Securities Act of 1933 (the &#8220;</font><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Act</font><font style="font-family:inherit;font-size:10pt;">&#8221;). In giving such consent, we do not thereby admit that we are included in the category of persons whose consent is required under Section&#160;7 of the Act or the rules and regulations of the Securities and Exchange Commission promulgated thereunder.</font></div><div style="line-height:120%;padding-top:13px;text-align:left;padding-left:336px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Very truly yours,</font></div><div style="line-height:120%;padding-top:13px;text-align:left;padding-left:336px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:120%;text-align:left;padding-left:336px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">/s/ Jones Day</font></div><div style="line-height:120%;text-align:left;padding-left:78px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:120%;text-align:left;padding-left:78px;font-size:10pt;"><font 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<DOCUMENT>
<TYPE>EX-23.1
<SEQUENCE>3
<FILENAME>ex231.htm
<DESCRIPTION>EXHIBIT 23.1
<TEXT>
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<div><a name="s1D02B4105948DDBBE98E13174BA8CC3D"></a></div><div></div><div><br></div><div style="line-height:120%;text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Exhibit 23.1</font></div><div style="line-height:138%;padding-bottom:32px;padding-top:32px;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;text-decoration:underline;">CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM</font></div><div style="line-height:138%;padding-bottom:8px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">We hereby consent to the incorporation by reference in this Registration Statement on Form S&#8209;8 of our report</font><font style="font-family:inherit;font-size:10pt;"><sup style="vertical-align:top;line-height:120%;font-size:7pt"> </sup></font><font style="font-family:inherit;font-size:10pt;">dated February 28, 2018 relating to the financial statements and the effectiveness of internal control over financial reporting, which appears in MPLX LP&#8217;s Annual Report on Form 10&#8209;K for the year end December 31, 2017.</font></div><div style="line-height:138%;padding-top:16px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">/s/ PricewaterhouseCoopers LLP  <br>Toledo, Ohio <br>March 12, 2018</font></div><div style="line-height:138%;padding-bottom:10px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div><br></div><div></div>	</body>
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<DOCUMENT>
<TYPE>EX-24.1
<SEQUENCE>4
<FILENAME>exhibit241.htm
<DESCRIPTION>EXHIBIT 24.1
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<div><a name="s70a71d693d9346b99f25a1072096f76e"></a></div><div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></div><div><br></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:120%;text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Exhibit 24.1</font></div><div style="line-height:120%;padding-top:13px;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">POWER OF ATTORNEY</font></div><div style="line-height:120%;padding-top:13px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">KNOW ALL BY THESE PRESENTS, that each of the undersigned directors and officers of MPLX GP LLC, a Delaware limited liability company and general partner of MPLX LP, a Delaware limited partnership (the &#8220;Registrant&#8221;), does hereby constitute and appoint Gary R. Heminger, Pamela K.M. Beall and C. Kristopher Hagedorn, or any of them, each acting alone, as the true and lawful attorney-in-fact or attorneys-in-fact for each of the undersigned, with full power of substitution and resubstitution, and in the name, place and stead of each of the undersigned, to execute and file (i)&#160;a Registration Statement on Form S-8 (the &#8220;Form S-8 Registration Statement&#8221;) with respect to the registration under the Securities Act of 1933, as amended, of common units representing limited partnership interests of the Registrant issuable in connection with the MPLX LP 2018 Incentive Compensation Plan (or any amendments, restatements or supplements thereto after the date hereof), (ii)&#160;any and all amendments, including post-effective amendments, supplements and exhibits to the Form S-8 Registration Statement and (iii)&#160;any and all applications or other documents to be filed with the Securities and Exchange Commission or any state securities commission or other regulatory authority or exchange with respect to the securities covered by the Form S-8 Registration Statement, with full power and authority to do and perform any and all acts and things whatsoever necessary, appropriate or desirable to be done in the premises, or in the name, place and stead of the said director and/or officer, hereby ratifying and approving the acts of said attorneys and any of them and any such substitute. This Power of Attorney may be executed in multiple counterparts, each of which will be deemed an original with respect to the person executing it.</font></div><div style="line-height:120%;padding-top:13px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">IN WITNESS WHEREOF, the undersigned have hereunto set their hands as of the 28</font><font style="font-family:inherit;font-size:10pt;"><sup style="vertical-align:top;line-height:120%;font-size:7pt">th</sup></font><font style="font-family:inherit;font-size:10pt;">&#32;day of February, 2018. </font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div><div style="line-height:120%;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="3"></td></tr><tr><td style="width:47%;"></td><td style="width:4%;"></td><td style="width:49%;"></td></tr><tr><td colspan="3" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr><tr><td style="vertical-align:top;border-bottom:1px solid #000000;padding-left:2px;padding-top:1px;padding-bottom:1px;padding-right:1px;"><div style="padding-bottom:1px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">/s/ Gary R. Heminger</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;border-bottom:1px solid #000000;padding-left:2px;padding-top:1px;padding-bottom:1px;padding-right:1px;"><div style="padding-bottom:1px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">/s/ Pamela K.M. Beall</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="padding-bottom:1px;padding-top:1px;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Gary R. Heminger</font></div><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Chairman of the Board and </font></div><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Chief Executive Officer of MPLX GP LLC </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="padding-bottom:1px;padding-top:1px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Pamela K.M. Beall</font></div><div style="text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Director, Executive Vice President and </font></div><div style="padding-bottom:1px;padding-top:1px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Chief Financial Officer of MPLX GP LLC</font></div><div style="padding-bottom:1px;padding-top:1px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></td></tr><tr><td style="vertical-align:top;border-bottom:1px solid #000000;padding-left:2px;padding-top:1px;padding-bottom:1px;padding-right:1px;"><div style="padding-bottom:1px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">/s/ C. Kristopher Hagedorn</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;border-bottom:1px solid #000000;padding-left:2px;padding-top:1px;padding-bottom:1px;padding-right:1px;"><div style="padding-bottom:1px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">/s/ Michael J. Hennigan</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="padding-bottom:1px;padding-top:1px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">C. Kristopher Hagedorn </font></div><div style="padding-bottom:1px;padding-top:1px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Vice President and Controller of MPLX GP LLC</font></div><div style="padding-bottom:1px;padding-top:1px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="padding-bottom:1px;padding-top:1px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Michael J. Hennigan</font></div><div style="padding-bottom:1px;padding-top:1px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Director and President of MPLX GP LLC</font></div></td></tr><tr><td style="vertical-align:top;border-bottom:1px solid #000000;padding-left:2px;padding-top:1px;padding-bottom:1px;padding-right:1px;"><div style="padding-bottom:1px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">/s/ Michael L. Beatty</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;border-bottom:1px solid #000000;padding-left:2px;padding-top:1px;padding-bottom:1px;padding-right:1px;"><div style="padding-bottom:1px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">/s/ David A. Daberko</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="padding-bottom:1px;padding-top:1px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Michael L. Beatty</font></div><div style="padding-bottom:1px;padding-top:1px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Director of MPLX GP LLC</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="padding-bottom:1px;padding-top:1px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">David A. Daberko</font></div><div style="padding-bottom:1px;padding-top:1px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Director of MPLX GP LLC</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:13px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:13px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:13px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr><tr><td style="vertical-align:top;border-bottom:1px solid #000000;padding-left:2px;padding-top:1px;padding-bottom:1px;padding-right:1px;"><div style="padding-bottom:1px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">/s/ Timothy T. Griffith</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;border-bottom:1px solid #000000;padding-left:2px;padding-top:1px;padding-bottom:1px;padding-right:1px;"><div style="padding-bottom:1px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">/s/ Christopher A. Helms</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="padding-bottom:1px;padding-top:1px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Timothy T. Griffith</font></div><div style="padding-bottom:1px;padding-top:1px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Director of MPLX GP LLC</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="padding-bottom:1px;padding-top:1px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Christopher A. Helms</font></div><div style="padding-bottom:1px;padding-top:1px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Director of MPLX GP LLC</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:13px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:13px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:13px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr><tr><td style="vertical-align:top;border-bottom:1px solid #000000;padding-left:2px;padding-top:1px;padding-bottom:1px;padding-right:1px;"><div style="padding-bottom:1px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">/s/ Garry L. 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Surma</font></div><div style="padding-bottom:1px;padding-top:1px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Director of MPLX GP LLC</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:16px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:16px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:16px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr><tr><td style="vertical-align:top;border-bottom:1px solid #000000;padding-left:2px;padding-top:1px;padding-bottom:1px;padding-right:1px;"><div style="padding-bottom:1px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">/s/ Donald C. 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Templin</font></div><div style="padding-bottom:1px;padding-top:1px;text-align:center;padding-left:1px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Director of MPLX GP LLC</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr></table></div></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div><br></div><div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></div>	</body>
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