List of companies

6,653 companies, A to Z

Company	Lists	Headquarters	Projects	Systems and facilities
Major Midstream Operating Partners, LLC	Owner/operator	Houston, TX		1
Major Pipeline LLC	Owner/operator	Grand Rapids, MI	1
Malarkey Roofing Products	Owner/operator	Portland, OR		1
Malcolm Pirnie, Inc.	Contractor		1
Mallard Pipeline Co	Owner/operator
Mangum Brick CO	Owner/operator			1
Manhattan Pipeline, LLC	Contractor		3
Manly Terminal LLC	Owner/operator			1
Manning Municipal Gas	Owner/operator	Manning, IA		1
Manning Natural Gas Dept	Owner/operator	Manning, IA		1
Manowske Welding Corp.	Contractor		1
Mansfield Pipeline, LLC	Owner/operator	Shreveport, LA		1
Manti Exploration Operating, LLC	Owner/operator		1
Manti Operating Company	Owner/operator		13
Map Production Company, Inc.	Owner/operator
Maples Gas Co Inc	Owner/operator			1
Marabou Midstream	Owner/operator
Marabou Superior Pipeline	Owner/operator	The Woodlands, TX		8
Maragas Texas Utilities, LLC	Owner/operator	Houston, TX		1
Marathon Ashland Pipe Line LLC	Owner/operator			1
Marathon Oil Co - Alaska	Owner/operator
Marathon Oil Company	Owner/operator	Houston, TX	1	2
Marathon Oil Ef LLC	Owner/operator	Houston, TX		26
Marathon Petroleum Co LLC	Owner/operator			23
Marathon Pipe Line (west)	Owner/operator	Findlay, OH		4
Marathon Pipe Line LLC	Owner/operator	Findlay, OH	5	49
Mardi Gras Pipeline, LLC	Owner/operator
Mariner Energy, Inc	Owner/operator
Marion Natural Gas System	Owner/operator	South Pittsburg, TN
Marion Pipeline Company, LLC	Owner/operator			1
Maritech Resources, Inc.	Owner/operator		2
Maritimes & Northeast Pipeline	Owner/operator	Houston, TX	9	1
MarkWest Liberty Midstream & Resource	Owner/operator		2	4
MarkWest New Mexico LP	Owner/operator	Denver, CO	1	1
MarkWest Pioneer LLC	Owner/operator	Denver, CO	2	3
Markwest	Owner/operator		6
Markwest Bluestone Ethane Pipeline, L.l.c.	Owner/operator	Denver, CO		1
Markwest East Texas PNG Utility, LLC	Owner/operator
Markwest Energy Appalachia, LLC	Owner/operator
Markwest Energy E TX Gas Co, LLC	Owner/operator			2
Markwest Energy East Texas Gas Co, L.p.	Owner/operator	Denver, CO		2
Markwest Energy Partners, L.P.	Owner/operator		1	8
Markwest Energy W TX Gas Co, LLC	Owner/operator			11
Markwest Energy West Texas Gas Company, L.l.c.	Owner/operator			1
Markwest Gas Services, L.l.c.	Owner/operator	Denver, CO
Markwest Javelina Company, L.l.c.	Owner/operator	Denver, CO		1
Markwest Javelina Pipeline Company, LLC	Owner/operator	Denver, CO		2
Markwest Liberty Bluestone, L.l.c.	Owner/operator	Denver, CO		2
Markwest Liberty Ethane Pipeline, L.l.c.	Owner/operator	Denver, CO		1
Markwest Liberty Midstream & Res	Owner/operator			1

Companies come from public sources: PHMSA and state filings, FERC dockets, the PLCA member list and the API 5L license list. See also pipeline systems, facilities and projects.