<SEC-DOCUMENT>0001552000-19-000017-index.html : 20190320
<SEC-HEADER>0001552000-19-000017.hdr.sgml : 20190320
<ACCEPTANCE-DATETIME>20190320134139
ACCESSION NUMBER:		0001552000-19-000017
CONFORMED SUBMISSION TYPE:	424B3
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20190320
DATE AS OF CHANGE:		20190320

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:		424B3
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-230172
		FILM NUMBER:		19694302

	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>424B3
<SEQUENCE>1
<FILENAME>mplx424b3seriesa.htm
<DESCRIPTION>424B3
<TEXT>
Document 1 - file: mplx424b3seriesa.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>s33719image1.jpg
<TEXT>
Document 2 - file: s33719image1.jpg

</DOCUMENT>
</SEC-DOCUMENT>