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M

M

Montour R.R.

8/1920-7/1923

M

Montour R.R. Co.

7/1930-10/1966

MA

Missouri and Arkansas Ry.

1/1941-7/1954

MAA

Magma Arizona R.R. Co.

1/1975-1/1980; eliminated 1/1994; 1/1994 (not listed); 7/2000-7/2005

MAAX

Maxx Leasing Co.

added 1/1981; eliminated 10/1988

MA&C

Minneapolis, Anoka and Cuyuna Range Ry.

7/1923

MA&C

Minneapolis, Anoka and Cuyuna Range Ry. Co.

7/1930

MA&C

Minneapolis, Anoka and Cuyuna Range R.R. Co.

7/1932-4/1938

MACR

Minneapolis, Anoka and Cuyuna Range R.R. Co.

1/1975

MACO

McCormick, Ashland City & Nashville R.R. Inc.

added 10/1988; eliminated 1/1993

MACX

Mahaffey Commission Co.

7/1935

MACX

Magor Car Corp.

added 7/1961; 7/1965-10/1966; eliminated 10/1967

MACX

Magor Railcar Division, Fruehauf Corp.

added 7/1968; 4/1970; eliminated 7/1970

MACX

Fruehauf Railcar Division, Fruehauf Corp.

added 7/1970

MACX

Magor Railcar Division, Fruehauf Corp.

eliminated 11/1973

MACX

Fruehauf Corp.

added 11/1973; 1/1975-1/1980; eliminated 7/1983

MACX

Mac Acquisitions, L.P.

added 10/1996; 7/2000-7/2005

MAEX

Maersk, Inc.

added 7/1990; eliminated 4/1993; 1/1994 (not listed)

MAGX

Magnimet, Monroe Scrap Division (interplant service)

1/1980; 1/1994 (not listed)

MAGX

Midwest Agri. Commodities Co.

added 7/2006

MAHX

Miller & Hart

7/1930-7/1932

MAHX

Miller & Hart (General American Tank Car Corp.)

7/1935

MAHX

General American Transportation Corp.

7/1937-4/1961; eliminated 10/1962

MAIX

Mason Iron and Paper Stock Inc.

7/2005 (not listed)

MAL

Michigan Air-Line Ry. Co.

added 4/2007

MALX

Mathieson Alkali Works, Inc.

7/1923-7/1937

MALX

Mid-America Locomotive & Car Repair, Inc.

7/2000-7/2005 (not listed)

MAMX

Mammoet USA, Inc.

added 4/2007

MANX

Manhattan Oil Co.

8/1920

MANX

Bannock Leasing, Inc.

added 1/1966; eliminated 10/1966

MANX

Manchester Gas Co.

added 4/1974; 1/1975-1/1980; eliminated 4/1989

MANX

EnergyNorth Natural Gas, Inc.

added 4/1989; eliminated 1/1996

MANX

Gas Supply, Inc.

eliminated 10/1999

MANX

EnergyNorth Natural Gas, Inc.

1/1994

MANX

Williams Energy Ventures, Inc.

added 10/1999; 7/2000; eliminated 4/2005

MANX

Semgroup LP

added 4/2005; 7/2005

MAPX

Mapco Products Co.

added 10/1980; eliminated 4/1985

MAPX

Mapco Petroleum, Inc.

added 4/1985

MAPX

Mapco Gas Products, Inc.

eliminated 10/1993

MAPX

Mapco Petroleum, Inc.

added 10/1993; 1/1994; eliminated 10/1999

MAPX

Williams Energy Ventures, Inc.

added 10/1999; 7/2000; eliminated 4/2005

MAPX

Semgroup LP

added 4/2005; 7/2005

MAR

Missouri and Arkansas Ry. Co.

7/1935-4/1938

MARC

Maryland Transit Administration

7/2005 (not listed)

MART

American Refrigerator Transit Co.

added 4/1960; 4/1961-10/1966; eliminated 10/1969

MARX

Marland Refining Co.

8/1920

MARX

Marland Tank Line Co. (Marland Refining Co.)

7/1923

MARX

Mather Stock Car Co.

added 10/1953; 7/1954; eliminated 7/1955

MARX

North American Car Corp.

added 7/1955; 10/1957-4/1970; eliminated 7/1973

MARX

MidAmerican Energy Co.

added 10/1998; 7/2000-7/2005

MA&S

Maxton, Alma & Southbound R.R. Co.

8/1920-7/1923

MASW

Mascot & Western R.R. Co.

8/1920-7/1930

MASX

North American Car Corp.

added 4/1968; 4/1970-1/1980; eliminated 1/1984

MASX

General Electric Railcar Services Corp.

added 1/1984; 1/1994; eliminated 10/1994

MATX

Mather Collieries

7/1923-7/1930

MATX

Mid-American Car & Equipment Co.

added 7/1965; 7/1965-1/1975; eliminated 4/1975

MATX

Merchants Investment Co.

added 4/1975; 1/1980; eliminated 1/1989

MATX

Railmark

added 1/1989

MAW

Maumee & Western R.R. Corp.

added 7/1998; 7/2000-7/2005; eliminated 4/2012

MAWX

Michigan Ammonia Works

8/1920-7/1923

MAWX

The Mathieson Alkali Works (Inc.)

7/1937-4/1947

MAWX

Mathieson Chemical Corp.

1/1950-7/1954; eliminated 10/1954

MAWX

Olin Mathieson Chemical Corp.

added 10/1954; 10/1957-10/1966; eliminated 1/1970

MAWX

Olin Corp.

added 1/1970; 4/1970; eliminated 4/1973

MAX

Michigan Alkali Co.

8/1920-1/1943

MAX

Wyandotte Chemicals Corp., Michigan Alkali Div.

1/1945-1/1946

MAXX

MidAmerican Energy Co.

added 4/1996; 7/2000-7/2005

MAYW

Maywood & Sugar Creek

1/1980-7/2005

MB

Montpelier & Barre R.R.

1/1975-1/1980; eliminated 1/1981

MB

Meridian & Bigbee R.R. Co.

1/1975-1/1994; eliminated 10/1997

MB

M&B R.R., LLC

added 10/1997; 7/2000-7/2005; eliminated 4/2012

MBBX

Michael D. Boxberger

added 1/1980; 1/1980; eliminated 1/1981

MBBX

Tank Car Services, Inc.

added 1/1981; eliminated 1/1986

MBCX

The Mann Bros. Co.

8/1920-7/1935

MBCX

Material Brokerage Co.

added 10/1996; eliminated 7/1998

MBCX

M.B.C.X. Leasing, LLC

added 7/1998; 7/2000; eliminated 4/2003; 7/2005 (not listed)

MBCX

Chicago Freight Car Leasing Co.

added 4/2007

MBFX

MBF Industries, Inc.

added 7/1979; 1/1980; eliminated 7/1991

MBIX

Merchants Biscuit Co.

7/1935

MBIX

Morse Bros., Inc.

7/2000-7/2005 (not listed)

MBKX

MRC Rail Services LLC

added 4/1998; added 10/1999; 7/2000; eliminated 10/2004

MBKX

Mitsui Rail Capital, LLC

added 10/2004; 7/2005

MBLX

McColl Brothers Ltd. (McColl-Frontenac Oil Co., Ltd.)

7/1930-7/1932

MBLX

Mobil Oil Corp.

added 1/1995; eliminated 7/2000

MBLX

Exxon Mobil Corp.

added 7/2000; 7/2000-7/2005

MBPX

MacMillan-Bloedel Products, Inc.

added 10/1971; eliminated 4/1973

MBPX

MacMillan-Bloedel Inc.

added 4/1973; 1/1975-1/1994; eliminated 1/1998; 7/2000-7/2005 (not listed)

MBRR

Meridian & Bigbee R.R. Co.

1/1975-1/1980

MBRX

Moseley Bros. Refrigerator Express

7/1923

MBSX

M.B. Suydam Co.

7/1930-1/1946

MBSX

M.B. Suydam Division, Pittsburgh Plate Glass Co.

4/1947-1/1952; eliminated 4/1954; 7/1954

MBSX

Mid-South Bulk Services, Inc.

added 4/2000; 7/2000-7/2005

M&BT

Marianna & Blountstown R.R.

7/1923-1/1950

MBT

Marianna & Blountstown R.R. Co.

added 11/1973; 1/1975; eliminated 1/1976; 1/1980

MBTX

Massachusetts Bay Transportation Authority

added 10/2002; 7/2005

MBX

Mechling Bros. Chemical Co.

7/1935

MBX

Mechling Bros. Chemicals, a Division of General Chemical Co.

7/1937-4/1938

MBX

Montrose Beef Co.

1/1946-10/1957; eliminated 4/1961

MC

Michigan Central R.R.

1/1975

MC

Consolidated Rail Corp.

1/1980

MC

Maine Coast R.R. Corp.

added 10/1992; eliminated 10/1993; 1/1994 (not listed); eliminated 1/1997; added 10/1999; 7/2000; eliminated 7/2002

MCAX

Mather Stock Car Co.

7/1937-7/1954; eliminated 7/1955

MCAX

North American Car Corp.

added 7/1955; 10/1957-1/1975; eliminated 4/1975

MCCX

Mutual Chemical Co. of America

7/1937-7/1954; eliminated 7/1955

MCCX

Mutual Chemical Division, Allied Chemical and Dye Corp.

added 7/1955; 10/1957

MCCX

Madison Coal Corp.

added 1/1961; eliminated 7/1963

MCCX

Mutual Chemical Division, Allied Chemical & Dye Corp.

eliminated 7/1958

MCCX

Madison Coal Corp.

4/1961

MCCX

Mt. Vernon Coal Transfer Co.

added 1/1983; 1/1994-7/2000; eliminated 10/2000

MCCX

Mt. Vernon Transfer Terminal, LLC

added 10/2000; eliminated 7/2002; 7/2005 (not listed)

MCDX

McDonough Brothers, Inc.

added 7/1978; 1/1980; eliminated 10/1983

MCDX

Redland Worth Corp.

added 10/1983; eliminated 4/1986

MCDX

Cementos Mexicanos, S.A.

added 4/1989; eliminated 7/1991

MCDX

Sunbelt Cement, Inc.

added 7/1991; 1/1994-7/2000; eliminated 10/2002

MCER

Massachusetts Central

1/1980-1/1994

MCER

Massachusetts Central R.R.

added 4/1995; 7/2000-7/2005

MCEX

Michigan Electrochemical Co.

7/1930

MCEX

Compania Mexicana de Comereio Exterior, S.A.

4/1947-7/1965; eliminated 10/1965

MCFX

McCall Farm Chemicals, Inc.

added 7/1954; 7/1954; eliminated 4/1955

MCGX

Mid-Co. Gasoline Co.

8/1920

MCHX

Merrimac Chemical Co.

8/1920-7/1923

MCHX

Merrimac Chemical Co., Inc.

7/1930-7/1935

MCHX

Merrimac Chemical Co.

7/1937

MCHX

Monsanto Chemical Co., Merrimac Division

4/1938-1/1952; eliminated 4/1954

MCHX

Monsanto Chemical Co., Everett Plant

added 4/1954; 7/1954; eliminated 7/1955

MCHX

PLM Railcar Maintenance Co.

added 4/1985; eliminated 10/1989

MCHX

Railcar Maintenance Co.

added 10/1989; eliminated 4/1990

MCHX

Transcisco Rail Services Co.

added 4/1990; eliminated 1/1991

MCHX

Transcisco Leasing Co.

added 1/1991; 1/1994; eliminated 7/1997

MCHX

Trinity Rail Management, Inc.

added 7/1997; 7/2000-7/2005; eliminated 1/2014

MCHX

Trinity Industries Leasing Co.

added 1/2014

MCIX

Monteros & Co., Inc.

7/1930

MCIX

Mooney Chemicals, Inc.

added 1/1959; 4/1961; 7/1965 (not listed)

MCIX

Applied Chemicals Division, Mobley Co., Inc.

1/1980

MCIX

SSI Mobley Co., Inc.

added 4/1989; eliminated 10/1989

MCIX

SSI Mobley Co., Inc. (MofW cars)

1/1994-7/2000 (not listed)

MCLR

McLaughlin Line R.R.

added 7/1988; eliminated 1/1992; 1/1994-7/2005

MCLX

North Western Refrigerator Line Co.

7/1937-7/1954; eliminated 4/1956

MCLX

North Western Refrigerator Line Co.,
A Division of North American Car Corp.

added 4/1956

MCLX

North American Car Corp.

10/1957

MCLX

North Western Refrigerator Line Co.

eliminated 7/1958

MCLX

Morrison Car Leasing, Inc.

added 4/1967; 4/1970-1/1980; eliminated 10/1985

MCMX

M C Rail Services Ltd.

7/2005 (not listed)

MCNX

Marshall Canning Co. (North American Car Corp.)

7/1932-7/1935

MCPX

M.C. Peters Mill Co.

8/1920-7/1923

MCPX

Mandan Creamery & Produce Co.

7/1932

MCPX

Mandan Creamery & Produce Co.
(North American Car Corp.)

7/1935

MCPX

Monsanto Chemical Co.

added 4/1962; eliminated 7/1964

MCPX

Monsanto Co.

added 7/1964; 7/1965-1/1994; eliminated 1/1998

MCPX

Solutia Inc.

added 1/1998; 7/2000; eliminated 10/2004; 7/2005 (not listed)

MCR

McCloud River Ry. Co.

1/1975-1/1980

MCR

McCloud Ry. Co.

1/1994-7/2005

MCRR

The Monongahela Connecting R.R. Co.

1/1975-7/2000; eliminated 1/2003; 7/2005

MCRX

McCook Rendering Co.

4/1947 (not listed); 1/1950-10/1957; eliminated 1/1958

MCRX

Marcus Rail Transport, L.L.C.

7/2000-7/2005 (not listed)

MC&S

Moscow, Camden & San Augustine R.R.

7/1923-4/1938

MCSA

Moscow, Camden & San Augustine R.R.

1/1975; added 7/1979; 1/1980; 1/1994; eliminated 1/2000; 7/2000-7/2005; added 10/2005; eliminated 7/2007; eliminated 7/2013

MCSX

Malvern Cold Storage Co.
(American Refrigerator Transit Co.)

7/1935

MCSX

Mells Cargo Supply, Inc.

1/1994 (not listed)

MCTA

Minnesota Central R.R. Co.

added 4/1995; eliminated 4/1997; 7/2000-7/2005

MCTR

Mackinac Transportation Co.

1/1975

MCTX

Matawan Coal Tar Products Corp.

7/1932

MCTX

Michigan Chemical Corp.

7/1954-1/1975; eliminated 4/1977

MCTX

Velsicol Chemical Corp.

added 4/1977; 1/1980; eliminated 7/1982

MCTX

Modern Continental Construction Co. Inc.

7/2000-7/2005 (not listed)

MCUX

Monroe Chemical Works (River Raisin Paper Co.)

7/1923-7/1930

MCVX

Massachusetts Call/Volunteer Firefighters Association

7/2000 (not listed)

MCVX

The Firefighters Education and Training Foundation

7/2005

MCWX

Morton Chemical Co.

added 4/1958; 4/1961; eliminated 4/1962

MCWX

Morton Salt Co.

added 4/1962; eliminated 7/1965

MCWX

Morton International, Inc.

added 7/1965; 7/1965-10/1966; eliminated 7/1969

MCX

The Mead Corp.

7/1937-7/1954; eliminated 7/1957

MCY

Motley County Ry. Co.

7/1923

MD

Municipal Docks Ry. of the Jacksonville Port Authority

1/1975

MD

Municipal Docks

1/1980

MD

C&J R.R. Co. d/b/a Mississippi Delta R.R.

7/2005; eliminated 1/2010; eliminated 4/2010

MDAX

Merchants Despatch Transportation Co.

added 1/1962; 7/1965-1/1980; eliminated 7/1985

MDCX

Middleboro Chemical Industries, Inc.

4/1970; added 7/1971; eliminated 1/1972

MDCX

Mexicana de Cobre, S.A. de C.V.

added 7/1989; 1/1994-7/2005; eliminated 1/2006

MDDE

Maryland and Delaware R.R. Co.

added 1/1978; 1/1980; eliminated 10/1987; 1/1994-7/2005; eliminated 10/2009

MDDX

Old Line Holding Co., Inc.

7/2000; eliminated 10/2004; 7/2005 (not listed)

MDFX

Merchants Despatch Transportation Co.

added 1/1962; eliminated 1/1963

MDIX

Modern Dispersions, Inc.

7/2000-7/2005 (not listed)_

MDKX

Molasses Distributors Corp.

7/1930

MDKX

Mandak Metal Processors Division of Gerdau MRM Steel Inc.

7/2000-7/2005 (not listed)

MDLR

The Midland Terminal Co.

added 10/1983; 1/1994-7/2000; eliminated 10/2003

MDLR

Pennsylvania Southwestern R.R. Inc.

added 10/2003; eliminated 4/2004; added 4/2005; 7/2005

MDP

Mexican Pacific R.R. Co., Inc.
(Ferrocarril Mexicano del Pacifico, S.A.)

1/1975-1/1980

MDP

Mexican Pacific R.R. Co., Inc.
(transferred to Ferrocarriles Nacionales de Mexico)

eliminated 10/1988

MDR

MidLouisiana Rail Corp.

added 1/1988; 1/1994; eliminated 7/1994

MDR

Kansas City Southern Ry. Co.

added 7/1994; 7/2000-7/2005

MDRX

The Midland Refining Co.

8/1920

MDRX

Midland Refining Co. (Skelly Oil Co.)

7/1923

MDRX

MDRC-1 LLC

added 10/2003; eliminated 4/2004; 7/2005 (not listed)

MDRY

Madison Ry. Co., Inc.

added 1/1978; eliminated 1/1979

MD&S

Macon, Dublin & Savannah R.R. Co.

8/1920-10/1957

MDS

Meridian Southern Ry., L.L.C.

7/2000-7/2005; added 7/2006

MDSB

Burlington Northern Inc.

1/1980

MDSX

Merchants Despatch Transportation Co.

added 4/1953; 7/1954; eliminated 1/1955; added 7/1955; eliminated 1/1956

MDT

Merchants Despatch Refrigerator Line
(Merchants Despatch, Inc.)

7/1923; 7/1935

MDT

Merchants Despatch Transportation Co.

7/1937-1/1980; eliminated 1/1983

MDTX

Merchants Despatch Transportation Co.
(New York Central R.R.)

8/1920

MDTX

Merchants Despatch Transportation Co.,
series 30000-31099 (Merchants Despatch, Inc.)

7/1923

MDTX

Merchants Despatch Transportation Corp.

added 7/1989; 1/1994; eliminated 7/1999

MDTX

Southern Region Industrial Realty, Inc.

added 7/1999; 7/2000-7/2005; eliminated 10/2015

MDUX

Montana-Dakota Utilties Co.

1/1945-1/1950

MDV

Maryland, Delaware & Virginia Ry. Co. (Penna. Ry. System)

8/1920-7/1923

MDW

Minnesota, Dakota & Western Ry. Co.

1/1975-7/2005

ME

Mississippi Eastern Ry.

7/1923-7/1954

ME

Morristown & Erie R.R. Co.

1/1975-1/1980; added 1/1986; eliminated 1/1988

ME

Morristown & Erie Ry., Inc.

added 1/1988; 1/1994-7/2005; eliminated 1/2008

MEC

Maine Central R.R. Co.

7/1930-1/1994; eliminated 4/1997; added 7/1998; 7/2000-7/2005; eliminated 10/2006; added 4/2009; eliminated 1/2016

MECX

Miner-Edgar Co.

8/1920-7/1923

MECX

Miner-Edgar Chemical Corp.

7/1930-7/1932

MECX

Transcisco Leasing Co.

added 7/1994; eliminated 7/1997

MECX

Trinity Rail Management, Inc.

added 7/1997; 7/2000-7/2005; eliminated 1/2007

MEFX

MexFresh, L.L.C.

7/2005 (not listed)

MELX

Milwaukee Electric Ry. & Light Co.

8/1920

MELX

Melwire Inc.

added 10/1985; eliminated 4/1991

MELX

Sunbelt Cement, Inc.

added 4/1991; eliminated 7/1991; 1/1994 (not listed); 7/2000 (not listed); added 10/2000; eliminated 10/2002

MEPX

McGraw-Edison Co.

added 4/1969; 4/1970-1/1980; eliminated 10/1993; 1/1994-7/2005 (not listed)

MERR

Morristown & Erie Ry. Inc. d/b/a Maine Eastern R.R.

added 1/2004; eliminated 7/2004; 7/2005

MERW

Mercersburg Ry., Inc.

added 4/1979; 1/1980; added 7/1980; eliminated 1/1981

MERX

The Mecca Refining Co.

7/1923

MERX

Mercantile Refrigerator Line (Merchants Despatch Transportation Corp.)

7/1937; 4/1938-10/1957

MERX

Merchants Despatch Transportation Co.

4/1961-4/1970; eliminated 1/1973

MERX

Merco, A Joint Venture

1/1994 (not listed); added 1/1997; 7/2000; eliminated 7/2002

MESX

Mears/CPG, Inc.

added 7/1998; 7/2000; eliminated 1/2002; 7/2005 (not listed)

MET

Modesto and Empire Traction Co.

1/1975-7/2005

METC

Modesto & Empire Traction Co.

7/1923-10/1966; eliminated 7/1974

METW

Municipality of East Troy, Wisc.

1/1975; added 10/1977; eliminated 10/1979; 1/1980-7/2005

METX

The Meader-Atlas Co.

8/1920-7/1923

METX

Northeast Illinois Regional Commuter R.R. Corp.

added 10/1996; 7/2000-7/2005; eliminated 10/2011

MEXX

Mexico Meridian Rail Services S.A. de C.V.

7/2005 (not listed)

MF

Middle Fork

1/1975-1/1980

MFAX

M.F.A. Egg & Poultry Association

7/1932

MFAX

Producers Produce Co.
(Merchants Despatch, Inc.)

7/1935

MFCX

Marfax Steel and Railway Equipment Co.

added 10/1967; 4/1970; eliminated 7/1970

MFCX

Farmers Coop Grain and Supply Co.

added 7/1980; eliminated 4/1989

MFCX

Chrysler Rail Transportation Corp.

eliminated 4/1993

MFCX

U.S. Rail Services, Inc.

added 4/1993; 1/1994; eliminated 4/1994

MFCX

USL Capital Rail Services

added 4/1994; eliminated 10/1996

MFCX

First Union Rail

added 10/1996; 7/2000-7/2005; eliminated 4/2016

MFCX

Wells Fargo Rail Corp.

added 4/2016

MFFX

Midwestern Farm Fertilizers, Inc.

4/1961 (not listed); added 1/1963; 7/1965; eliminated 10/1965

MFFX

M4 Holdings Ltd.

added 4/1985; eliminated 1/1992; 1/1994-7/2005 (not listed)

MFLX

McColl-Frontenac Oil Co., Ltd.

7/1930-7/1954; eliminated 1/1956

MFNX

Morlunda Farms

added 1/1963

MFNX

Morlunda Farms, Oscar Nelson, Inc.

added 4/1965; added 1/1967; 4/1970; eliminated 7/1971

MFVX

Merchants Despatch Transportation Corp.

added 4/1965; 7/1965-1/1975; eliminated 4/1976; 1/1980

MFX

Morris Fertilizer Co.

8/1920

MFX

Merchants Fertilizer Co. (Armour Car Lines)

7/1923

MFX

Merchants Fertilizer Co.

7/1937 (not listed); 1/1943 (not listed)

MG

Mobile & Gulf R.R. Co.

1/1975-1/1980; eliminated 10/1985

MGA

Monongahela Ry. Co.

8/1920-10/1966 & 1/1975-1/1980; eliminated 7/1993

MGA

Consolidated Rail Corp.

added 7/1993; 1/1994; eliminated 7/1999

MGA

Norfolk Southern Ry. Co. (Norfolk Southern)

7/2000-7/2005

MGAC

Monongahela Connecting R.R. Co.

7/1965-10/1966

MGAX

Moon Gasoline Co.

7/1923-7/1932

MGCX

Morrison Grain Co.

added 1/1967; eliminated 4/1967

MGLX

McGoldrick Lumber Co.

7/1937-1/1946

MGLX

Mobil Grain Ltd.

added 1/2008; eliminated 4/2008

MGMX

J and J Leasing

added 4/1989; eliminated 10/1989

MGMX

J and J Partnership

added 10/1989; eliminated 10/1993; 1/1994-7/2005 (not listed)

MGPX

L.M. Martini Grape Products

7/1932-4/1938

MGRI

MG Rail, Inc.

added 10/1985; 1/1994-7/2000; eliminated 4/2004; 7/2005

MGRS

Ferrocarrils Nacionales de Mexico (National Rys. of Mexico)

1/1975-1/1980

MGSX

Martin Gas Sales, Inc.

added 1/1981; 1/1994-7/2000; eliminated 4/2001

MGSX

CF Martin Sulphur, LP

added 4/2001; 7/2005; eliminated 1/2007

MGSX

Martin Operating Partnership, L.P. d/b/a Martin Sulphur

eliminated 4/2010

MH

Mount Hood Ry. Co.

1/1975-1/1980; eliminated 1/1989

MH

Mount Hood R.R.

added 1/1989; eliminated 10/1989

MH

Mount Hood R.R. Co.

7/2000-7/2005

MHAX

U.S. Dept. of the Interior, Bureau of Mines Helium Activity

added 7/1955

MHAX

U.S. Dept. of the Interior, Bureau of Mines

10/1957-7/1965

MHAX

U.S. Dept. of the Interior, Bureau of Mines Helium Activity

10/1966; eliminated 7/1971

MHAX

U.S. Dept. of the Interior, Bureau of Mines,
Helium Operations

added 7/1971; 1/1975-1/1980

MHAX

U.S. Dept. of the Interior, Bureau of Mines,
Helium Operations, Amarillo, Texas

eliminated 7/1980

MHAX

U.S. Dept. of the Interior, Bureau of Mines,
Helium Field Operations, Amarillo, Texas

added 7/1980; eliminated 10/1981

MHAX

U.S. Dept. of the Interior, Bureau of Mines,
Division of Helium Operations, Amarillo, Texas

added 10/1981; eliminated 7/1982

MHAX

U.S. Dept. of the Interior, Bureau of Mines,
Helium Field Operations, Amarillo, Texas

added 7/1982; 1/1994

MHAX

U.S. Dept. of the Interior, Bureau of Land Management,
Helium Operations

eliminated 10/1998

MHAX

U.S. Dept. of the Interior, Bureau of Mines,
Helium Field Operations, Amarillo, Texas

7/2000-7/2005 (not listed)

MHCO

Marquette & Huron Mountain R.R. Co., Inc.

1/1975-1/1980

MHFX

Mount Hope Finishing Co.

8/1920

MHFX

MHF Logistical Solutions Inc.

added 10/1998; 7/2000-7/2005

MHHR

Mahanoy and Hazleton Ry., Inc.

added 7/1985; eliminated 10/1986

MHHX

Mohawk & Hudson Chapter, National Railway Historical Society

added 10/2003; eliminated 1/2004; 7/2005 (not listed)

MHLX

Union Refrigerator Transit Lines

added 1/1962; 7/1965

MHLX

Union Refrigerator Transit Lines,
Division of General American Transportation Corp.

10/1966

MHLX

Union Refrigerator Transit Lines

4/1970

MHLX

Union Refrigerator Transit Lines,
Division of General American Transportation Corp.

eliminated 10/1971

MHLX

General American Transportation Corp., Freight Car Division

added 10/1971

MHLX

General American Transportation Corp.

1/1975-1/1980; eliminated 10/1992

MHM

Mount Hope Mineral R.R.Co.

1/1975

MHM

Consolidated Rail Corp.

1/1980

MHMX

Miner-Hillard Milling Co.

added 10/1963; 7/1965-10/1966; eliminated 4/1967

MHRX

Mile-High Railcar Leasing, Inc.

added 1/1980; 1/1980; eliminated 1/1988

MHRX

Mile-High Railcar Services, Inc.

added 1/1988; eliminated 1/1993; eliminated 4/1993; 1/1994-7/2005 (not listed)

MHSF

Morehead & South Fork R.R. Co., Inc.

added 7/2008; eliminated 10/2008

MHSX

Midvale-Heppenstall Co.

added 10/1965; 10/1966-4/1970; eliminated 1/1971

MHTX

Mangels, Herold Co., Inc.

7/1930-10/1957; eliminated 4/1960

MH&W

Hill City Ry. Co.

8/1920

MHWA

Mohawk, Adirondack & Northern R.R. Corp.

1/1994; added 1/1996; 7/2000-7/2005; eliminated 10/2006

MHX

The Michael Hoffman Fuel Co.

1/1943-1/1945; 1/1946 (not listed)

MHZX

Matthieson & Hegeler Zinc Co.

7/1930-1/1952; eliminated 1/1954

MI

Minnesota & International Ry. Co.

4/1938-1/1941

MI

Missouri-Illinois R.R. Co.

10/1957-10/1966 & 1/1975

MI

Missouri Pacific R.R. Co.

1/1980

MI

Missouri Pacific System

1/1994; eliminated 4/1997

MI

Union Pacific R.R. Co.

added 4/1997; 7/2000-7/2005

MICO

Midland Continental R.R.

10/1966

MICX

Mid-Continent Refining Co.

8/1920-7/1923

MICX

Mississippi Chemical Corp.

1/1952-4/1970; eliminated 7/1971

MICX

Mis Coa, a partnership of Mississippi Chemical Corp. and Coastal Chemical Corp.

added 7/1971; eliminated 10/1972

MICX

Mississippi Chemical Corp.

added 10/1972; 1/1975-1/1980; eliminated 10/1981

MID

Midway R.R. Co.

1/1975

MID

Midway

1/1980

MIDH

Middletown & Hummelstown R.R. Co.

1/1980-7/2005

MIDX

Midland Packing Co.

8/1920

MIDX

Merchants Despatch Transportation Co.

added 10/1962; 7/1965-4/1970; eliminated 1/1973

MIDX

Midwest Energy Services Co.

added 4/1989; 1/1994

MIDX

Unitrain, Inc.

added 1/1994; eliminated 4/1998

MIDX

MRC Rail Services, LLC

added 4/1998; 7/2000

MIDX

Mitsui Rail Capital, LLG

7/2005, eliminated 1/2010

MIGN

Michigan Northern Ry. Co., Inc.

added 10/1976; eliminated 1/1979; 1/1980; eliminated 4/1989

MILW

Chicago, Milwaukee, St. Paul and Pacific R.R. Co.

7/1936, 1/1941-10/1966 & 1/1975-1/1980; eliminated 1/1981

MILW

Chicago, Milwaukee, St. Paul and Pacific R.R. Co.
(Richard B. Ogilvie, Trustee)

added 1/1981

MILW

Chicago, Milwaukee, St. Paul and Pacific R.R. Co.

eliminated 7/1985

MILW

The Milwaukee Road

added 7/1985; eliminated 4/1986

MILW

Soo Line R.R. Co.

1/1994-7/2005

MILX

Milchem Inc.

added 4/1982; eliminated 7/1988

MILX

Milpark Drilling Fluids

added 7/1988; eliminated 7/1993

MILX

General Electric Railcar Services Corp.

added 7/1993; 1/1994; eliminated 1/2000

MILX

General Electric Rail Services Corp.

added 1/2000; 7/2000-7/2005; eliminated 4/2016

MILX

Wells Fargo Rail Corp.

added 4/2016

MIMX

Minera Mexico Internacional, Inc.

added 7/1978; 1/1980; eliminated 7/1987; 1/1994-7/2005 (not listed)

MINE

Minneapolis Eastern Ry. Co.

1/1975-1/1980

MINX

Minnesota Mining and Manufacturing Co., Inc.

1/1941-10/1966; eliminated 4/1968

MIPX

Millennium Petrochemicals, Inc.

7/2000; eliminated 4/2001; 7/2005 (not listed)

MIR

Minneapolis Industrial Ry. Co.

4/1961-10/1966 & 1/1975-1/1980; eliminated 1/1985

MIRX

Mindis Recycling

added 1/1997

MIRX

Regional Recycling, L.L.C.

7/2000-7/2005

MIS

Mississippi Central R.R. Co.

1/1994-7/2005

MISS

Mississippian

1/1975-1/1980

MISS

The Mississippian Ry., Inc.

added 1/1981; eliminated 1/1987

MISS

The Mississippian Ry. Cooperative, Inc.

added 1/1987; 1/1994-7/2005; eliminated 4/2011

MISX

Milwaukee Solvents & Chemicals Corp.

added 1/1974; 1/1975-1/1994; 7/2000 (not listed)

MISX

M-I L.L.C.

added 7/2011

MITX

Interall Holdings, Inc.

added 10/1960; 4/1961; eliminated 4/1963

MIW

Tomahawk Ry., Limited Partnership

eliminated 4/1995

MIX

Milton Ice Co., Inc.

7/1935

MJ

Manufacturers' Junction Ry. Co.

8/1920-7/2005; eliminated 1/2006

MJGX

M.J. Goodrich

7/1932

MJGX

M.J. Goodrich Co.
(North Western Refrigerator Line Co.)

7/1935

MJRX

Railway Service Contractors

added 10/2003; eliminated 1/2004; 7/2005 (not listed)

M&K

Morgantown & Kingwood R.R.

8/1920

M&K

Morgantown & Kingwood R.R. (Baltimore & Ohio R.R.)

7/1923

MKC

McKeesport Connecting R.R. Co.

1/1946-7/2005; eliminated 7/2013; eliminated 1/2014

MKC

Union Railroad Co. (Pittsburgh, PA)

added 1/2014

MKCX

Michigan Chemical Co.

7/1923

MKCX

Morrison Knudsen Corp.

7/2000-7/2005 (not listed)

MKFX

Century Rail Enterprises, Inc.

7/2005 (not listed)

MKGX

North American Car Corp.

added 10/1960; 4/1961-1/1975; eliminated 10/1979

MKIX

Marshall Kirby & Co., Inc.
(Merchants Despatch, Inc.)

7/1935

MKIX

Morrison-Knudsen Co., Inc.

added 10/1971; 1/1975; eliminated 10/1975

MKIX

Morrison-Knudsen Railroad Equipment Leasing Co., Inc.

added 10/1975; eliminated 1/1976

MKIX

M-K Railroad Equipment Leasing Co., Inc.

added 1/1976; 1/1980; eliminated 4/1989; 1/1994 (not listed)

MKIX

Morrison Knudsen Corp.

7/2000-7/2005 (not listed)

MKMX

Rail Connection LLC

added 1/2016

MKPX

Meyer Kornblum Packing Co.
(Merchants Despatch, Inc.)

7/1935

MKPX

Meyer Kornblum Refrigerator Car Co.

7/1937-1/1943

MKPX

Campbell Soup Co., Central Division

1/1945-4/1947

MKRX

McKean County Refining Co.

7/1930

MK&T

Missouri, Kansas & Texas Ry. (M. K. & T. Lines)

8/1920

M-K-T

Missouri-Kansas-Texas R.R. Co. (M.-K.-T. Lines)

7/1923-7/1936

M-K-T

Missouri-Kansas-Texas R.R. Co.

4/1938

MKT

Missouri-Kansas-Texas R.R. Co.

1/1941-10/1966 & 1/1975-1/1980; eliminated 1/1990

MKT

Missouri Pacific System

added 1/1990; 1/1994; eliminated 4/1997

MKT

Union Pacific R.R. Co.

added 4/1997; 7/2000-7/2005

MKTT

Missouri, Kansas & Texas Ry. of Texas (M. K. & T. Lines)

8/1920

MKTT

Missouri-Kansas-Texas R.R. Co. of Texas (M.-K.-T. Lines)

7/1923-7/1936

MKTT

Missouri-Kansas-Texas R.R. Co. of Texas

4/1938-4/1961

MKTT

Missouri-Kansas-Texas R.R. Co.

7/1965-10/1966 & 1/1975-1/1980; eliminated 1/1990

MKTT

Missouri Pacific System

added 1/1990; 1/1994; eliminated 4/1997

MKTT

Union Pacific R.R. Co.

added 4/1997; 7/2000-7/2005

MKX

Misko Refineries, Inc.

7/1930

MLCX

American Refrigerator Transit Co.

added 7/1970; 1/1975-7/2005; eliminated 1/2010

MLD

Midland Ry. Co. of Manitoba

4/1938-10/1966

MLD

Midland

1/1975-1/1980

MLEX

Bulk Equipment Specialist

1/1994 (not listed)

MLEX

Miles Inc.

7/2000-7/2005 (not listed)

MLHX

Missouri Improvement Co.

added 10/1971; 1/1975-1/1980; eliminated 7/1983

MLHX

American Refrigerator Transit Co.

added 7/1983

MLIX

Melbo Land & Investment Co.

7/2005 (not listed)

MLKX

Milk Products Refrigerator Line
(Merchants Despatch, Inc.)

7/1935

MLKX

Merchants Despatch Transportation Co.
(reporting marks for Milk Products Refrigerator Line)

7/1937-4/1938

MLKX

Merchants Despatch Transportation Co.

1/1950-4/1970; eliminated 10/1970

MLLX

Montell U.S.A., Inc.

added 4/1996; 7/2000; eliminated 1/2001

MLLX

Basell U.S.A., Inc.

added 1/2001; 7/2005; eliminated 7/2010

MLLX

Equistar Chemicals, LP

added 7/2010

MLMX

Morrison Grain Co., Inc.

added 7/1974; 1/1975-1/1980; eliminated 4/1987

MLMX

Metal Management Inc.

7/2005 (not listed)

MLOX

Minnesota Linseed Oil Co.

8/1920-7/1930

MLR

Mineral Range R.R. Co.

8/1920-7/1954

M&LS

Manistique & Lake Superior R.R.

7/1930-7/1936

MLS

Manistique & Lake Superior R.R.

4/1938-10/1966

MLST

Milstead

1/1975-1/1980

MLSX

Monsanto Co.

added 10/1997; added 1/1998; 7/2000-7/2005

ML&T

Morgan's Louisiana & Texas R.R.
(Southern Pacific Lines in Texas and Louisiana)

8/1920-7/1936

ML&T

Morgan's Louisiana & Texas R.R.

4/1938-7/1954

MLTX

Maple Leaf Tank Car Co.

7/1935; 7/1937 (not listed)

MLUX

Monsanto Chemical Co.

added 7/1959; 4/1961; eliminated 7/1964

MLUX

Monsanto Co.

added 7/1964; 7/1965-1/1994; eliminated 1/1998

MLUX

Solutia Inc.

added 1/1998; 7/2000-7/2005; eliminated 7/2009

MLWX

MLWX Co.

1/1945-10/1957; eliminated 7/1960

MLX

Master Lubricants Co.

4/1938-4/1961; eliminated 7/1963

M&M

Meridian and Memphis Ry. Co.
(Gulf, Mobile and Northern R.R. Co.)

8/1920-7/1923

MMA

Montreal, Maine and Atlantic Ry. Ltd.

added 4/2003; 7/2005

MMAX

Defense Plant Corp.

1/1945-1/1946

MMAX

Martin Marietta Aluminum Inc.

added 7/1982; eliminated 1/1985

MMAX

Martin Marietta Corp.

added 4/1985; 1/1994; eliminated 7/1997; 7/2000-7/2005 (not listed)

MMAX

Martin Marietta Materials, Inc.

added 7/2007

MMBX

Martin Marietta Corp.

added 1/1979; 1/1980; eliminated 7/1986

MMBX

Master Builders, Inc.

added 10/1987; 1/1994; eliminated 10/1995; added 10/1996; eliminated 1/1997; 7/2000-7/2005 (not listed)

MMCX

McClintle-Marshall Construction Co.

7/1923

MMCX

North American Car Corp.

added 1/1961; 4/1961-4/1970; eliminated 1/1972

MMCX

M & M Chemical Products, Inc.

added 7/1977; 1/1980; eliminated 7/1989

MMCX

TransMatrix, Inc.

added 7/1989; 1/1994-7/2000; eliminated 4/2002

MMCX

Pan American Railway Co.

added 4/2002; 7/2005

MMGX

McMan Oil & Gas Co.

8/1920-7/1930

MMGX

McMan Oil & Gas Co. (Stanolind Oil & Gas Co.)

7/1932-7/1935

MMGX

Stanolind Oil & Gas Co.

7/1937-4/1947

MMID

Maryland Midland Ry. Co.

added 1/1981; added 4/1981; eliminated 1/1984

MMID

Maryland Midland Ry., Inc.

added 1/1984; 1/1994-7/2005

MMIX

Metal-Matic, Inc.

added 7/1973; 1/1975-1/1980; eliminated 4/1984

MMKX

Monarch Manufacturing Co.

7/1923

MMKX

Mona Motor Oil Co.

7/1930-7/1932

MMMX

Minnesota Mining & Manufacturing d/b/a 3M

7/2000-7/2005 (not listed)

MMRR

Mid-Michigan R.R., Inc.

added 4/1988; 1/1994-7/2005

MMRX

McMurrey Refining Co.

7/1937 (not listed)

MMRX

Double M Ranch Enterprises

1/1994-7/2005 (not listed)

MMSX

Martin Marietta Cement, Division of Martin Marietta Corp.

added 1/1975; 1/1975; eliminated 1/1979

MMSX

Martin Marietta Corp.

added 1/1979; 1/1980; eliminated 7/1983

MMSX

Blue Circle Inc.

added 7/1983; eliminated 4/1987

MMT

Mission Mountain R.R.

7/2005; added 4/2008

MMX

Mosinee Paper Mills Co.

4/1938-1/1943; 1/1945 (not listed)

MMX

Monarch Molasses Co.

1/1950-1/1952; eliminated 1/1953

M&NA

Missouri & Northern Arkansas R.R.

8/1920

M&NA

Missouri & Northern Arkansas Ry. Co.

7/1923-4/1938

MNA

Missouri & Northern Arkansas R.R. Co., Inc.

added 4/1993; 1/1994-7/2000; eliminated 7/2002; 7/2005; added 7/2010

MNAX

C&S Directional Boring, Inc.

7/2000-7/2005 (not listed)

MNBR

M&B R.R., L.L.C.

added 10/1997; 7/2000-7/2005; eliminated 4/2012

MNC

Motive Rail Inc. d/b/a Missouri North Central R.R.

added 7/2004; 7/2005; eliminated 1/2006

MNCW

Metro-North Commuter R.R.

1/1994-7/2005

MNCX

Maintenance Inc.

added 7/1957; 10/1957-4/1961; eliminated 4/1962

MNCX

Minnesota Corn Processors, Inc.

added 4/1985; 1/1994-7/2000; eliminated 10/2000; 7/2005 (not listed)

MNDX

SunPrairie Grain

7/2005 (not listed)

M&NE

Manistee & Northeastern R.R. Co.

8/1920-7/1923

M&NE

Manistee & Northeastern Ry. Co.

7/1930-7/1954

MNJ

Middletown and New Jersey Ry. Co., Inc.

1/1975; added 4/1978; 1/1980-7/2005; eliminated 10/2006

MNL

Mountain Laurel R.R. Co.

1/1994

MNLX

Exxon Mobil Corp.

7/2000-7/2005 (not listed); eliminated 1/2016

MNN

Minnesota Northern R.R., Inc.

7/2000; added 4/2001; 7/2005; eliminated 10/2008

MNNR

Minnesota Commercial Ry. Co.

added 4/1987; 1/1994-7/2005

MNPX

Morton Salt Co.

added 7/1980; eliminated 7/1981

MNPX

Morton Salt-Division Norwich Products, Inc.

added 7/1981; eliminated 10/1981

MNPX

Morton Salt-Division of Morton Norwich Products, Inc.

added 10/1981; eliminated 4/1987

MNPX

Morton Salt-Division of Morton Thiokol, Inc.

added 4/1987; 1/1994; eliminated 4/1997

MNPX

Morton International, Inc.

added 4/1997; 7/2000; eliminated 7/2003

MNR

Burlington Northern Inc.

added 10/1975; 1/1980; eliminated 4/1981

MNS

Minneapolis, Northfield and Southern Ry.

1/1952-10/1966 & 1/1975-1/1980; eliminated 4/1980

MNS

Minneapolis, Northfield and Southern Ry., Inc.

added 4/1980; eliminated 4/1986

MNS

Soo Line R.R. Co.

1/1994-7/2005

MNTX

Minnesota Transportation Museum, Inc.

7/2005 (not listed)

MNVA

Minnesota Valley Transportation Co., Inc.-Southwest

added 7/1984; eliminated 10/1990

MNVA

MNVA R.R., Inc.

added 10/1990; 1/1994; eliminated 4/1995

MNWX

Minnesota Dept. of Public Service
Weights and Measures Division

added 7/1993; 1/1994; eliminated 10/1999; 7/2000-7/2005 (not listed)

MNX

Mond Nickel Co., Ltd. (Canadian Industries Ltd.)

7/1930

MNX

National Car Co.

1/1950-7/1954; eliminated 7/1956

MNX

Burlington Refrigerator Express Co.

added 7/1956; eliminated 10/1956

MNX

National Car Co.

added 10/1956; 10/1957-4/1970; eliminated 1/1972

MNX

Western Fruit Express Co.

added 1/1972; 1/1975-1/1980; eliminated 1/1981

MOBX

Mobil Oil Co., a Division of Socony Mobil Oil Co., Inc.

added 4/1960; eliminated 10/1966

MOBX

Mobil Oil Corp.

added 10/1966; 10/1966-1/1994; eliminated 7/2000

MOBX

Exxon Mobil Corp.

added 7/2000; 7/2000-7/2005

MOC

Missouri Central R.R. Co.

7/2000-7/2005

MOCX

Missouri Portland Cement Co.

1/1941; 4/1947-1/1980; eliminated 10/1984

MOCX

The Mosaic Co.

added 1/2010

MOD

Texas and Pacific Railway Co.

1/1975; eliminated 1/1977

MOD

Missouri Pacific Railroad Co.

added 1/1977; 1/1980

MOD

Missouri Pacific System

eliminated 10/1981; eliminated 5/1983

MODX

American Refrigerator Transit Co.

added 7/1955; 10/1957-1/1975; eliminated 7/1977

MOEX

Morgan Engineering Co.

added 7/1963; 7/1965-1/1975; eliminated 1/1976

MOEX

Morgan Engineering, a Unit of the Equipment Systems Division, AMCA International Corp.

added 1/1976; 1/1980; eliminated 10/1981

MOEX

Morgan Engineering, Koehring Production System Division AMCA International Corp.

added 10/1981; eliminated 10/1984

MOFX

Maxton Oil & Fertilizer Co.

added 7/1965; 7/1965-1/1980; eliminated 1/1991; 1/1994-7/2000 (not listed)

MOGX

Mangum Oil & Gas Co.

added 4/1988; eliminated 7/1993

MOGX

C.W. Brooks, Inc.

added 7/1993; 1/1994-7/2005

MOHX

Monsanto Chemical Co.

added 1/1960; 4/1961; eliminated 7/1964

MOHX

Monsanto Co.

added 7/1964; 7/1965-1/1994; eliminated 1/1998

MOHX

Solutia Inc.

added 1/1998; 7/2000; eliminated 1/2002; 7/2005 (not listed)

MOLX

McCombs Producing & Refining Co.

8/1920

MOLX

Emmel Co.

added 7/1958; eliminated 10/1958

MOLX

Emmel Corp.

added 10/1958; eliminated 10/1959

MOLX

International Molasses Corp. Ltd.

added 1/1998; eliminated 4/1998; 7/2000-7/2005 (not listed)

MON

Monon R.R.

10/1957-10/1966

MON

Louisville and Nashville R.R. Co.

1/1975-1/1980; eliminated 1/1983

MON

Seaboard System R.R., Inc.

added 1/1983; eliminated 7/1987

MON

CSX Transportation, Inc.

added 7/1987; 1/1994-7/2005

MONX

Monsanto Chemical Works

8/1920-7/1932

MONX

Monsanto Chemical Co.

7/1935-4/1961; eliminated 7/1964

MONX

Monsanto Co.

added 7/1964; 7/1965-1/1994; eliminated 1/1998

MONX

Solutia Inc.

added 1/1998; 7/2000-7/2005; eliminated 7/2009

MORX

Mather Stock Car Co.

1/1941-7/1954; eliminated 7/1955

MORX

North American Car Corp.

added 7/1955; 10/1957-1/1975; eliminated 4/1976

MOSX

Martin Oil Service, Inc.

1/1950-10/1966; eliminated 7/1967

MOSX

Mosinee Paper Corp.

1/1994-7/2005 (not listed); eliminated 1/2014

MOSX

Expera Specialty Solutions, LLC

added 1/2014

MOT

Marine Oil Transportation

1/1975-7/2005

MOTC

Montreal Tramways

1/1975-7/2005

MOTX

Museum of Transportation

7/2000-7/2005 (not listed)

MOV

Moshassuck Valley R.R. Co.

1/1975-1/1980; eliminated 1/1983

MOWX

A.D. Miller's Sons Co.

7/1923-7/1932; 7/1937-4/1938 (not listed)

MOWX

Fortaleza Construction Co.

7/2005 (not listed)

MOXV

Moxahala Valley Ry. Co.

added 10/1983; eliminated 10/1987

MP

Missouri Pacific R.R. Co.

7/1923-10/1966 & 1/1975-1/1980

MP

Missouri Pacific System

1/1994; eliminated 4/1997

MP

Union Pacific R.R. Co.

added 4/1997; 7/2000-7/2005

M&PA

Maryland & Pennsylvania R.R. (Co.)

8/1920-10/1966

M&PA

Maryland & Pennsylvania R.R. Co.

4/1970

MPA

Maryland & Pennsylvania R.R. Co.

1/1975-1/1994; eliminated 4/2000

MPA

York Ry. Co.

added 4/2000; 7/2000-7/2005

MPCX

Magnolia Petroleum Co.

8/1920-10/1957; eliminated 1/1960

MPCX

Mobil Oil Co., a Division of Socony Mobil Oil Co., Ltd.

added 1/1960

MPCX

Socony Mobil Oil Co., Inc.

4/1961

MPCX

Mobil Oil Co.,
a Division of Socony Mobil Oil Co., Inc.

eliminated 10/1962

MPCX

Moyer Packing Co.

added 10/1981; eliminated 1/1987

MPCX

Michaels Pipeline Construction, Inc.

added 4/1991; 1/1994-7/2000; eliminated 4/2003

MPCX

Michaels Corp.

added 4/2003

MPCX

Michels Corp.

7/2005; eliminated 7/2008

MPDX

Michigan Producers Dairy Co. (Merchants Despatch, Inc.)

7/1935

MPDX

Merchants Despatch Transportation Corp.
(reporting marks for Michigan Products Dairy Co.)

7/1937-1/1941

MPEX

Motivepower Industries Inc.

7/2000-7/2005 (not listed)

MPFX

American Refrigerator Transit Co.

added 10/1963; eliminated 1/1965

MPHX

Memphis Packing Corp. (Quaker City Refrigerator Line)

7/1930-7/1932

MPHX

Memphis Packing Corp. (General American Tank Car Corp.)

7/1935

MPIX

Snow Ice, Inc.

7/1937-1/1943 (not listed)

MPIX

Myer's Propane Gas Service, Inc.

added 7/1974; 1/1975-1/1980; eliminated 7/1986

MPIX

Motive Power, Inc.

7/2000-7/2005 (not listed)

MPKX

Michigan Pickle Co.

1/1950-1/1952; eliminated 7/1954

MPKX

Marhoefer Packing Co., Inc.

4/1970; eliminated 7/1973

MPKX

Sunburst Cattle Co.

added 7/1973; 1/1975; eliminated 4/1976

MPLI

Minnesota Prairie Line Inc.

added 10/2002; 7/2005

MPLX

Mexican Petroleum Co. (Mexican Petroleum Corp.)

8/1920

MPLX

Mexican Petroleum Corp.

7/1923-7/1954; eliminated 10/1954

MPLX

American Oil Co.

added 10/1954; 10/1957; eliminated 4/1961

MPLX

Marhoefer Packing Co., Inc.

added 1/1969

MPLX

North American Car Corp.

added 4/1973; 1/1975-1/1980; eliminated 1/1984

MPLX

General Electric Railcar Services Corp.

added 1/1984; 1/1994; eliminated 10/1994

MPMX

Marathon Paper Mills Co.

7/1937-1/1943

MPMX

Marathon Corp.

1/1945-10/1957; eliminated 4/1958

MPMX

Marathon, a Division of American Can Co.

added 4/1958; eliminated 7/1959

MP&N

Mineral Point & Northern Ry. Co.

7/1923

MPOX

Merchants' & Planters' Oil Co.

8/1920-7/1935; 7/1937 (not listed)

MPPX

Montana Phosphate Products Co.

added 7/1955; eliminated 4/1956

MPRX

The Miller Petroleum Refining Co.

8/1920

MPRX

Miller Petroleum Co.

7/1923

MPRX

Montana Power Co.

1/1952-10/1957; eliminated 10/1960

MPRX

Motive Power Equipment and Solutins, Inc.

7/2005 (not listed)

MPSX

Missouri Public Service Co.

added 10/1968; 4/1970-1/1980; eliminated 4/1989

MPSX

Missouri Public Service

added 4/1989

MPSX

Missouri Public Service Co.

1/1994-7/2000

MPSX

Missouri Public Service

7/2005; eliminated 1/2006

MPTX

Magnolia Provision Co.

8/1920-7/1923

MPTX

Union Tank Car Co.

added 7/1973; eliminated 1/1974

MPTX

Procor Ltd.

added 1/1974; 1/1975-7/2005; eliminated 10/2015

MPWX

Meigs Pulpwood Co., Inc.

8/1920

MPWX

Muscaline Power & Water

added 4/1994; 7/2000; eliminated 10/2001; 7/2005 (not listed)

MPX

Magnetic Pigment Co.

7/1937-1/1943

MPX

Columbian Carbon Co., Magnetic Pigment Division

1/1945-1/1952; eliminated 10/1953

MPZX

Mineral Point Zinc Co.

8/1920-4/1938

MPZX

Mineral Point Zinc Division, The New Jersey Zinc Co.

1/1941-10/1957; eliminated 10/1958

MQCX

Marquette Co.

added 7/1976; eliminated 10/1976

MQCX

Marquette Cement Manufacturing Co.,
a Division of Marquette Co.

added 10/1976

MQCX

Marquette Co.

eliminated 1/1979

MQCX

Marquette Co.,
a subsidiary of Gulf & Western Industries, Inc.

added 1/1979; 1/1980; eliminated 4/1980

MQCX

Monarch Cement Co.

added 4/1980; eliminated 4/1987; 1/1994 (not listed)

MQGX

Morrison-Quirk Grain Corp.

added 7/1973; 1/1975-1/1980

MQGX

XTRA, Inc.

eliminated 1/1988

MQPX

Millennium Inorganic Chemicals, Inc.

added 7/2000; 7/2000-7/2005; eliminated 4/2013

MQPX

Cristal USA Inc.

added 4/2013

MQRX

Macquarie Rail Inc.

added 4/2008; eliminated 4/2015

MQRX

First Union Rail

added 4/2015; eliminated 4/2016

MQRX

Wells Fargo Rail Corp.

added 4/2016

MQT

Marquette Rail LLC

added 7/2006

MR

McCloud River R.R. Co.

8/1920-1/1980; eliminated 7/1992

MR

McCloud Ry. Co.

added 7/1992; 1/1994-7/2005

MRAX

Mineral Range, Inc.

7/2000-7/2005 (not listed)

MRBX

Merchants Despatch Transportation Co.

added 10/1953; 7/1954-4/1970; eliminated 7/1970

MRC

Michigan R.R. Co.

7/1923

MRCX

Merck & Co., Inc.

7/1932

MRCX

Metals Reserve Co., care of Tin Processing Corp.

1/1943

MRCX

Morrison Railway Supply Corp.

added 4/1969; 4/1970-1/1980; eliminated 4/1980

MRCX

United States Railway Leasing Co.

added 4/1980; eliminated 10/1980

MRCX

Evans Railcar Leasing Co.

added 10/1980; eliminated 4/1988

MRCX

Itel Rail Corp.

added 4/1988; eliminated 10/1992

MRCX

General Electric Railcar Services Corp.

added 10/1992; 1/1994; eliminated 1/2000

MRCX

General Electric Rail Services Corp.

added 1/2000; 7/2000-7/2005; eliminated 10/2015

MRDX

MidAmerican Energy Co.

added 4/1999; 7/2000-7/2005

MREX

Marshall Railway Equipment Corp.

added 7/1956; 10/1957-1/1980; eliminated 10/1987

MREX

Monad Railway Equipment Co.

7/2000-7/2005 (not listed)

MRI

Mohall R.R., Inc.

7/2000-7/2005

MRIX

Monarch Refineries, Inc.

1/1950-7/1954; eliminated 1/1957

MRJX

Marcus-Ruth-Jerome Co.

7/1935-4/1938

MRL

Montana RailLink, Inc.

added 4/1988; 1/1994-7/2005

MRLM

Minneapolis, Red Lake and Manitoba Ry. Co.

4/1938

MRLX

Morris & Co. Refrigerator Line

8/1920

MRLX

Morris & Co. Refrigerator Lines (Armour Car Lines)

7/1923-7/1932

MRLX

Mid America Railcar Leasing LLC

added 10/2003; eliminated 4/2004; 7/2005 (not listed)

MRMX

MRMX Leasing & Management, LLC

7/2005 (not listed)

MRMX

Midwest Railcar Corp.

added 4/2007

MROX

Mobile Rosin Oil Co.

7/1930-7/1935; 7/1937 (not listed)

MROX

Marathon Petroleum Co. LLC

added 1/2009; added 4/2009

M&RR

Minneapolis & Rainy River Ry. Co.

8/1920-7/1932

MRR

Mid Atlantic R.R. Co., Inc.

added 7/1988; 1/1994; eliminated 4/1996

MRR

The Carolina Southern R.R. Co.

added 4/1996; 7/2000; eliminated 10/2002; 7/2005

MRRX

Mather Refrigerator Express (Mather Horse & Stock Car Co.)

8/1920-7/1923

MRRX

Mather Refrigerator Express (Mather Stock Car Co.)

7/1930-7/1954; eliminated 7/1955

MRRX

North American Car Corp.

added 7/1955; 10/1957-1/1980; eliminated 1/1984

MRRX

General Electric Railcar Services Corp.

added 1/1984; 1/1994; eliminated 10/1994

MRRX

Murphy Road Recycling LLC

added 1/2004; 7/2005; eliminated 1/2012

MRS

Manufacturers Ry. Co.

8/1920-4/1938

MRS

Manufacturers Ry. Co. of St. Louis

1/1941-7/1954

MRS

Manufacturers Ry. Co.

10/1957-7/2005; eliminated 10/2011

MRSX

Mile-High Railcar Leasing, Inc.

added 10/1983; eliminated 1/1988

MRSX

Mile-High Railcar Services, Inc.

added 1/1988; eliminated 4/1993; 1/1994-7/2005 (not listed)

MRTX

Marx Hide & Tallow Co., Inc.

7/1935-7/1937

MRTX

Cemex, Inc.

added 1/2007; eliminated 10/2011

MRUX

Morrell Refrigerator Car Co. (Dissolved)

7/1935

MRUX

Union Refrigerator Transit Co. (Morrell Refrigerator Car Co.)

7/1937-4/1938

MRUX

Union Refrigerator Transit Co.

1/1941-4/1947

MRUX

Union Refrigerator Transit Lines,
a Division of the General American Transportation Corp.

1/1950-10/1966

MRUX

Union Refrigerator Transit Lines

eliminated 7/1967

MRX

Morrell Refrigerator Line

8/1920-7/1923

MRX

Morrell Refrigerator Car Co. (Dissolved)

7/1930-7/1935

MRX

Morrell Refrigerator Line (T.H. Foster, Trustee)

7/1937-1/1952

MRX

Morrell Refrigerator Line

eliminated 7/1954

MRX

Mather Stock Car Co.

added 7/1954; 7/1954; eliminated 7/1955

MRX

North American Car Corp.

added 7/1955; 10/1957-7/1965; eliminated 10/1966; 10/1966 (not listed); 4/1970-1/1975

MS

Missouri Southern R.R. Co.

8/1920-1/1952

MS

Michigan Shore R.R., Inc.

added 7/1991; 1/1994-7/2005

MSBP

Muscle Shoals, Birmingham & Pensacola Ry. Co.

7/1923

MSC

Mississippi Central R.R.

8/1920-10/1966

MSC

Illinois Central Gulf R.R.

1/1975-1/1980

MSCI

Mississippi Central R.R. Co.

added 4/1998; 7/2000; eliminated 10/2001; 7/2005

MSCX

Mather Stock Car Co.

7/1935-7/1954; eliminated 7/1955

MSCX

North American Car Corp.

added 7/1955; 10/1957-1/1975; eliminated 4/1975

MSDR

Mississippi Delta R.R.

added 4/1986; 1/1994-7/2000; eliminated 1/2003

MSDR

Knoxville & Holston River R.R. Co., Inc.

added 1/2003; 7/2005

MSE

Mississippi Export R.R. Co.

4/1938-7/2000; eliminated 10/2004; 7/2005

MSEX

Muessel Brewing Co. (Merchants Despatch, Inc.)

7/1935

MSEX

Mountain States Energy Corp.

added 7/1986; eliminated 10/1987

MSGX

Michigan Sugar Co.

7/1930-4/1938

MSGX

Merchants Despatch Transportation Corp.

added 1/1954; 7/1954-7/1965; eliminated 10/1965

MSIX

Maine Sugar Industries, Inc.

4/1970

MSIX

Morton International, Inc.

added 10/1996; 7/2000-7/2005; eliminated 10/2010

MSKX

Middle States Creamery Co.

7/1932

MSKX

Middle States Creameries, Inc.
(North Western Refrigerator Line Co.)

7/1935

MSKX

Milwaukee Solvay Coke Co.

1/1950-4/1961; eliminated 1/1963

MSKX

Milwaukee Solvay Coke Co., Inc.

added 1/1963; eliminated 7/1965

MSKX

Milwaukee Solvay Coke Division,
Manganese Chemicals Corp.

added 7/1965; eliminated 7/1966

MSKX

Milwaukee Solvay Coke Co.,
a Division of Pickands Mather & Co.

added 7/1966; 10/1966-4/1970; eliminated 10/1970

MSLC

Minnesota Short Lines Co.

1/1980

MSLX

Marsulex, Inc.

added 1/2008; eliminated 1/2012

MSLX

Chemtrade West Limited Partnership.

added 1/2012

MSMX

Mid South Milling Co., Inc.

added 4/1981; eliminated 10/1993; 1/1994 (not listed); added 10/2005; eliminated 4/2010

MSN

Meeker Southern R.R.

7/2005

MSO

Michigan Southern R.R., Inc.

added 4/1991; 1/1994; eliminated 1/1998; 7/2000-7/2005

MSPX

P4 Production, L.L.C.

added 1/1998; 7/2000-7/2005

MSR

Mississippi Southern R.R.

7/2005; added 4/2008

MSRC

MidSouth Rail Corp.

added 7/1986; 1/1994; eliminated 7/1994

MSRC

Kansas City Southern Ry. Co.

added 7/1994; 7/2000-7/2005

MSRW

Mississipian Ry. Cooperative, Inc.

added 1/1987; 1/1994-7/2005; eliminated 4/2011

MSRX

Modern Sanitary Rendering Co., Inc.

4/1947-1/1952; eliminated 4/1954; 7/1954

MSRX

Southeastern Industrial Enterprises, Inc.

added 10/2002; 7/2005; eliminated 10/2006

MSSX

Minnesota Steel Co.

8/1920-7/1932

MSSX

Minnesota Steel Co. (American Steel & Wire Co.)

7/1935

MSSX

American Steel & Wire Co.

7/1937-4/1938

MSSX

MSSA Co.

7/2005 (not listed)

MSTL

Chicago & North Western Ry.

4/1961

MSTL

Minneapolis & St. Louis Ry. Co.
(Chicago and North Western Ry. Co.)

7/1965-10/1966

MSTL

Chicago and North Western Transportation Co.

1/1975-1/1994; eliminated 1/1995

MSTL

Chicago and North Western Ry. Co.

added 1/1995; eliminated 10/1995

MSTL

Union Pacific R.R. Co.

added 10/1995; 7/2000-7/2005

MSTR

The Massena Terminal R.R. Co.

1/1975; eliminated 1/1979; 1/1980-1/1994; eliminated 4/1997; 7/2000-7/2005; added 7/2010

MSV

Mississippi & Skuna Valley R.R. Co.

added 7/1974; 1/1975-7/2005; eliminated 7/2012

MSWY

Minnesota Southern Ry., Inc.

7/2005

MSX

Mutual Sales Co.

8/1920

MSX

Morton Salt Co.

7/1954-4/1961; eliminated 10/1964

MT

Mississipppi & Tennessee RailNet, Inc.

7/2000-7/2005

MTAX

MTAX Corp.

added 7/1988; 1/1994; eliminated 4/1996; 7/2000-7/2005 (not listed)

MTC

Mystic Terminal Co. (Boston and Maine R.R.)

7/1930-7/1936

MTC

Mystic Terminal Co. (Boston and Maine Corp.)

4/1938

MTC

Mystic Terminal Co.

1/1941-4/1961

MTC

Mystic Terminal Co. (Boston and Maine Corp.)

7/1965-10/1966

MTC

Mystic Terminal Co.

1/1975-1/1980

MTC

Boston and Maine Corp.

eliminated 1/1993

MTCO

Macon Terminal Co.

1/1975-7/2005

MTCX

Texas Calgary Co.

added 7/1957; 10/1957; eliminated 1/1960

MTCX

Mallard Transportation Co.

added 7/1961; 7/1965-7/2005; eliminated 4/2015

MTDX

Midwest Transportation & Development Corp.

added 4/2001; eliminated 10/2002; 7/2005 (not listed)

MT&E

Morristown & Erie R.R.

8/1920-10/1957

MTEX

Michigan Tanning & Extract Co.

8/1920-7/1923

MTFR

The Minnesota Transfer Ry. Co.

1/1975-1/1980

MTFX

Midwest Railcar Corp.

added 4/2014

MTLX

Morris & Co. Tank Line (Morris & Co. Refrigerator Line)

8/1920

MTLX

Morris & Co. Tank Line (Armour Car Lines)

7/1923

MTLX

McKenzie Tank Lines, Inc.

added 1/1964; eliminated 4/1965; 7/1965 (not listed)

MTLX

Metal Link International, LLC

added 10/2001; eliminated 1/2004; 7/2005 (not listed)

MTMX

Modern Track Machinery Canada Ltd.

1/1980

MTMX

Modern Track Machinery Canada Ltd. (MofW cars)

1/1994 (not listed)

MTNR

Mississippi Tennessee R.R. LLC

7/2005

MTNX

Rocky Mountain Transportation Services

added 4/1996; 7/2000-7/2005

MTPX

Montana Power Co.

added 10/1994; 7/2000-7/2005

MTR

Midland Terminal Ry. Co.

8/1920-4/1947

MTR

Montour R.R. Co.

4/1961-10/1966 & 1/1975-1/1980; eliminated 10/1986

MTR

The Pittsburgh & Lake Erie R.R. Co.

eliminated 1/1993

MTR

Youngstown & Southern Ry. Co.

1/1994-7/2005

MTRX

TransMatrix, Inc.

added 10/1992; 1/1994-7/2000; eliminated 1/2004; 7/2005 (not listed)

MTSX

Max Transportation Service

added 10/1963; 7/1965-4/1970; eliminated 7/1973

MTTX

Trailer Train Co.

added 10/1964; 7/1965-1/1980; eliminated 1/1992

MTTX

TTX Co.

added 1/1992; 1/1994-7/2005

MTW

Marinette, Tomahawk & Western R.R. Co.

1/1975-1/1980; eliminated 4/1992

MTW

Tomahawk Ry., Limited Partnership

added 4/1992; 1/1994 (not listed)

MTX

Morrell Tank Line (Morrell Refrigerator Line)

8/1920-7/1923

MTX

Morrell Tank Line (Morrell Refrigerator Car Co.)

7/1930-7/1935

MTX

Morrell Tank Line (T.H. Foster, Trustee)

7/1937-1/1952

MTX

Morrell Tank Line

eliminated 7/1954

MTX

Mather Stock Car Co.

added 7/1954; 7/1954; eliminated 7/1955

MTX

North American Car Corp.

added 7/1955; eliminated 10/1957; added 1/1958; eliminated 7/1959

MTX

Tomahawk Ry., Limited Partnership

eliminated 4/1993

MU

Middletown & Unionville R.R.

4/1938

M&U

Middletown & Unionville R.R.

8/1920-7/1936; 1/1941-1/1946

MUCX

Murro Chemical Co., Inc.

added 4/1964; 7/1965-1/1975; eliminated 7/1976; eliminated 10/1978

MUNX

Mather Stock Car Co.

7/1937-7/1954; eliminated 1/1955

MURX

Mutual Refining Co.

8/1920-7/1932

MURX

Mutual Refining Co. (Superior Oil Works)

7/1935

MUSC

Memphis Union Station Co.

1/1975-7/2005

MUSX

Musher & Co., Inc.

8/1920

MUTX

Mutual Tank Line

7/1923

MV

Midland Valley R.R. Co.

7/1923-10/1966

MVCX

Minnesota Valley Canning Co.
(North Western Refrigerator Line Co.)

7/1935

MVCX

Chaparral Energy, Inc.

added 10/1980; eliminated 1/1985

MVKX

Tubular Transport Services, Inc.

added 10/2005; eliminated 4/2016

MVP

Missouri & Valley Park R.R. Corp.

added 10/2003; 7/2005; eliminated 1/2012

MVRY

The Mahoning Valley Ry. Co.

added 4/1982; 1/1994-7/2000; eliminated 10/2001

MVRY

The Mahoning Valley R.R.

eliminated 10/2004

MVRY

Ohio Central R.R. System

added 10/2004

MVRY

The Mahoning Valley Ry. Co.

7/2005

MVT

Monongahela Valley Traction Co.

8/1920

MVT

Monongahela Valley Traction Co.
(Monongahela West Penn Public Service Co.)

7/1923

MVT

Monongahela Valley Traction Co. (series 700-852 & 854-999 see Cumberland & Pennsylvania R.R.)

7/1923

MVT

Monongahela West Penn Public Service Co.

7/1930-7/1932

MVT

Mt. Vernon Terminal

1/1975-7/2005

MVTX

Plains Marketing, L.P.

added 4/2016

MVX

Milwaukee Vinegar Co.

added 11/1934; 7/1935-7/1954; eliminated 4/1957

MW

Minnesota Western Ry. Co.

7/1935-10/1957

MWAX

Martin Marietta Materials, Inc.

added 7/1997; 7/2000-7/2005 (not listed)

MWBX

Midwest By-Products Co.

added 7/1974; 1/1975-1/1980; eliminated 7/1987

MWBX

Midwest By-Products Co., a Division of Gilco, Inc.

added 7/1987; 1/1994; eliminated 10/1995

MWCL

Midwest Coal Handling, Inc.

1/1994-7/2005

MWCX

Marshall Wells Co., Ltd.

7/1937 (not listed)

MWCX

Midwest Railcar Corp.

added 4/2000; 7/2000-7/2005

MWDX

Mid-West Despatch Car Co.

8/1920

MWDX

Mid-West Despatch Car Co.
(Nickel Plate-Lackawanna Dairy Line)

7/1923

MWDX

Mid-West Despatch Car Co.

7/1930-1/1943

MWEX

Mars Inc.

7/1932-7/1935

MWEX

Union Refrigerator Transit Co.

7/1937-4/1947

MWEX

Union Refrigerator Transit Lines,
a Division of General American Transportation Corp.

1/1950-4/1961

MWEX

Mars Inc.

4/1963

MWEX

Union Refrigerator Transit Lines

added 4/1963

MWEX

Union Refrigerator Transit Lines,
a Division of General American Transportation Corp.

7/1965-4/1970; eliminated 4/1971

MWGX

Midwest Generation, LLC

7/2005; eliminated 4/2015

MWGX

NRG Power Marketing LLC

added 4/2015

MWHX

Markwest Hydrocarbon Partners, Ltd.

added 1/1993; 1/1994-7/2005; eliminated 10/2008

MWHX

Markwest Hydrocarbon Inc.

added 10/2008; eliminated 1/2016

MWKX

Marden-Wild Corp.

7/1930-7/1937; 1/1941-4/1961; eliminated 10/1964

MWLX

Midwest Locomotive Leasing & Sales, Inc.

7/2000-7/2005 (not listed)

MWMX

Mid-West Mineral Products, Inc.

added 7/1969; 4/1970; eliminated 10/1971

MWMX

Mid-West Mud Co., Inc.

added 1/1978; 1/1980; eliminated 4/1985

MWMX

Golden Leasing

added 7/1985; 1/1994-7/2005; eliminated 1/2008

MWP

Monongahela West Penn Public Service Co.

7/1935-1/1941

MWPX

Pasbro Holding Co.

added 7/1969; 4/1970-1/1975; eliminated 4/1978

MWPX

Murco Wall Products Inc.

7/2005 (not listed)

M&W

Morgantown & Wheeling Ry. Co.

7/1923

M&WR

Montpelier & Wells River R.R. (Boston & Maine R.R.)

8/1920-7/1923

M&WR

Montpelier & Wells River R.R.

7/1930-1/1941

MWR

Muncie and Western R.R. Co.

4/1938-1/1994; eliminated 1/1995

MWRC

Mount Washington Ry. Co.

1/1975-7/2005

MWRL

Hilvista Investment Co. d/b/a Molalia Western Ry.

1/1994-7/2000

MWRR

Montana Western Ry. Co., Inc.

added 1/1987; 1/1994-7/2000; eliminated 1/2004; 7/2005

MWRX

The Midwest Refining Co.

8/1920-7/1923

MWRX

MidWest Rail Holdings, Inc.

7/2000-7/2005 (not listed)

MWRY

Mineral Wells & Eastern Ry. Co.

added 7/1990; eliminated 4/1993; 1/1994 (not listed)

MW&S

Montana, Wyoming & Southern R.R. Co.

8/1920-7/1936

MWS

Montana, Wyoming & Southern R.R. Co.

4/1938-7/1954

MWSX

Midwest Solvents Co., Inc.

1/1980; eliminated 1/1986

MWSX

Midwest Grain Products, Inc.

added 1/1986; 1/1994; eliminated 10/1994

MWSX

General Electric Railcar Services Corp.

added 10/1994; eliminated 1/2000

MWSX

General Electric Rail Services Corp.

added 1/2000; 7/2000-7/2005; eliminated 4/2016

MWSX

Union Tank Car Co.

added 4/2016

MWTT

Michigan-Wisconsin Transportation Co.

added 4/1985; eliminated 10/1991; 1/1994

MWTX

Midwest Ethanol Transport, LLC

added 1/2007

MWWX

Menasha Wooden Ware Co. (Menasha Wooden Ware Corp.)

7/1930-7/1932

MX

Macmillan Petroleum Corp.

7/1937 (not listed)

MYSX

Myles Salt Co., Ltd. (Bay Chemical Co., Inc.)

7/1930-4/1938

MYSX

Bay Chemical Co., Inc.

1/1941-4/1947

MYTX

Mytec Polymers

added 10/2003; 7/2005; eliminated 1/2006

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