O

OACX

The O.A. Cooper Co.

added 1/1974; 1/1975-1/1980; eliminated 5/1983

OACX

Central Transportation Co., Inc.

added 7/1983; eliminated 10/1988

OAKX

Oak Ridge Waste and Recycling of CT, LLC

7/2020 (not listed)

OALX

Oregon-American Lumber Corp.

7/1937-1/1952; eliminated 1/1953

OAMX

Omaha Alfalfa Milling Co.

8/1920-7/1923

OAR

Old Augusta R.R. Co.

added 7/1983; 1/1994-7/2005; eliminated 7/2006

OAR

Old Augusta R.R. LLC

added 7/2006; 7/2020

OBCX

The Neatsfoot Oil Refineries Corp.

7/1935-4/1938

OBRX

Oregon Beverage Recycling Cooperative

7/2020 (not listed)

OCAX

Blue Cube Operations LLC

7/2020 (not listed)

OCCX

Occidental Chemical Co.

added 4/1981; eliminated 1/1983

OCCX

Occidental Chemical Agricultural Products, Inc.

added 1/1983; eliminated 7/1988

OCCX

Occidental Chemical Corp. Agricultural Products Group

added 7/1988; eliminated 4/1989

OCCX

Occidental Chemical Corp. Agricultural Products

added 4/1989; eliminated 1/1992

OCCX

Occidental Chemical Corp.

added 1/1992; 1/1994-7/2020

OCE

Oregon, California & Eastern Ry. Co.

1/1975; added 4/1977; 1/1980; eliminated 4/1992; 1/1994

OCFX

Owens Corning Fiberglas

1/1994-7/2005 (unlisted)

OCFX

Iowa Fertilizer Co.

7/2020 (not listed)

OCGX

Ohio Cities Gas Co. (The Pure Oil Co.)

8/1920

OCOX

O'Bannon Corp.

8/1920

OCOX

O'Bannon Co.

7/1923

OCPX

Occidental Chemical Corp., PVC Resins

added 1/1988; eliminated 1/1992

OCPX

Occidental Chemical Corp.

added 1/1992; 1/1994; eliminated 7/1999

OCPX

Oxy Vinyls L.P.

added 7/1999; 7/2000-7/2020

OCR

Oklahoma Central R.R. Co.

added 1/1988; eliminated 7/1990; 1/1994-7/2020

OCRR

Ottawa Central Ry.

added 4/2000; 7/2000-7/2020

OCRX

Oil Creek Refining Co.

7/1923-7/1935

OCRX

Oklahoma Central R.R.

7/2000-7/2005 (unlisted)

OCSX

Omaha Cold Storage Co.

7/1932

OCSX

Omaha Cold Storage Co.
(North Western Refrigerator Line Co.)

7/1935

OCTL

Oil Creen & Titusville Lines

1/1994-7/2020

OCTR

Octoraro Ry., Inc.

added 10/1978; 1/1980, eliminated 10/1985; 1/1994; eliminated 10/1994; 7/2000

OCTR

Morristown & Erie Ry., Inc., d/b/a Ontario R.R.

added 10/2003; 7/2005

OCTR

Morristown & Erie Ry., Inc., d/b/a Octoraro R.R.

eliminated 4/2007; 7/2020

OCTX

Octel America, Inc.

7/2000-7/2020 (unlisted)

OCVX

Ozark Cider & Vinegar Co.

8/1920-7/1923

OCVX

Gregory-Robinson-Speas, Inc.

7/1935-1/1950

ODCX

Old Dominion Chapter, National Railway Historial Society

7/2005-7/2020 (unlisted)

ODOX

Old Dominion Oil Co.

8/1920

ODRX

Ozark Refining Co.

8/1920

ODTX

Oil-Dri Corp. of America

added 10/1996; added 7/1999; 7/2000-7/2005; eliminated 7/2012; 7/2020 (not listed)

OD&W

Oneida & Western R.R.

4/1938-7/1954

OE

The Ohio Electric Ry. Co.

8/1920

OE

Oregon Electric Ry.

1/1950-7/1965

OE

Oregon Electric Ry. Co.
(Spokane, Portland & Seattle Ry. Co.)

10/1966

OE

Oregon Electric Ry. Co.

1/1975-1/1980

OECX

Oldbury Electro-Chemical Co.

7/1937-7/1954; 10/1957 (unlisted); eliminated 10/1957

OEDX

Ohio Edison Co.

added 4/1958; 4/1961-1/1980; eliminated 5/1983

OELX

O.E. Linsin, Inc.

7/1935-4/1970; eliminated 4/1974

OEX

The Oak Extract Co.

8/1920-7/1923

OEXX

Orford Express Inc.

7/2020 (not listed)

OFAX

RESIDCO

added 7/2012; 7/2020

OFBX

RESIDCO

added 7/2012; 7/2020

OFCX

Ortner Freight Car Co.

added 10/1967; 4/1970-1/1980; eliminated 7/1987

OFCX

Residco

added 7/1987; 1/1994-7/2000; eliminated 10/2004; 7/2005 (unlisted); added 7/2008; eliminated 10/2015; 7/2020

OFEX

RESIDCO

eliminated 10/2015

OFGX

The Osage Gasoline Corp.

7/1923

OFIX

Olie Fabrieken Institute
(Java Coconut Oil Co., Ltd. of New York)

8/1920-7/1923

OFKX

Otto Koch

7/1930

OFKX

Koch Tank Line

7/1932-7/1935

OFKX

Koch Tank Line, Inc.

7/1937-10/1966; eliminated 1/1967

OFKX

Witco Chemical Co., Inc.

added 1/1967; eliminated 1/1969

OFKX

Witco Chemical Corp.

added 1/1969; 4/1970-1/1975

OFOX

Residco

added 7/1988; 1/1994-7/2000; eliminated 10/2004; 7/2005 (unlisted); added 7/2008; 7/2020

OFPX

The Otoe Food Products Co.

7/1932-7/1935

OFSX

Ogden Financial Services Corp.

added 7/1985; 1/1994; eliminated 1/1995

OFSX

Tucson Electric Power Co.

added 1/1995; 7/2000; eliminated 7/2002; 7/2005 (unlisted)

OFSX

EnviroSolutions, Inc.

added 7/2007; eliminated 1/2017; 7/2020 (not listed)

O&G

Oakdale & Gulf Ry. Co.

7/1923

OGCX

The Osage Gasoline Co.

8/1920

OGEE

Ogeechee Ry. Co.

added 10/1989; eliminated 1/1993; 1/1994-7/2000

OGEX

Oklahoma Gas and Electric Co.

added 7/1976; 1/1980-7/2020

OGIX

O&G Industries, Inc.

7/2020 (not listed)

OGOX

Oklahoma Gasoline & Oil Co.

7/1923

OGPX

Oklahoma Gasoline Plants, Inc.

7/1930-1/1943

OGSX

Iowa Southern Utilities Co.

added 7/1980; 1/1994; eliminated 1/1996

OGSX

IES Utilities, Inc.

added 1/1996; eliminated 4/2000

OGSX

Alliant Energy

added 4/2000; 7/2000; eliminated 1/2002; 7/2005-7/2020

OHCR

Ohio Central R.R. Inc.

added 7/1988; 1/1994

OHCR

Ohio R.R. System

eliminated 10/1992

OHCR

The Columbus & Ohio River R.R. Co.

added 10/1992

OHCR

Ohio Central R.R. Inc.

1/1994-7/2020

OHCX

Old Hickory Chemical Co.

7/1932-4/1961; eliminated 1/1965

OHCX

Stauffer Chemical Co. — Eastern Branch

added 4/1965; 7/1965 (unlisted)

OHFX

Fluor Daniel Fernald

7/2000-7/2005 (unlisted)

OHFX

US Department of Energy EM Consolidated Business Center

7/2020 (not listed)

OHGX

Otha H. Grimes

7/1930-7/1935

OHGX

Otha H. Grimes (Grimes Gasoline Co.)

7/1937-4/1938; 1/1943-7/1954

OHIC

Ohi-Rail Corp.

added 10/1982; eliminated 10/1987; eliminated 1/1991; 1/1994-7/2020

OHIO

Ohio Terminal Railway Co.

7/2020

OHOX

U.S. Dept. of Energy Ohio Field

7/2000-7/2005 (unlisted)

OHPA

Ohio & Pennsylvania R.R. Co.

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

OHPA

Ohio Central Railroad

7/2020

OHPX

Merchants Despatch Transportation Corp.

added 1/1955; 10/1957-4/1961; eliminated 1/1964

OHRY

Owego and Harford Ry., Inc.

added 7/1992; 1/1994-7/2005; eliminated 10/2009; 7/2020

OHSX

O.H. Schoenwald

1/1943-1/1945

OHSX

Schoenwald Petroleum Co.

1/1946-1/1950

OHTX

O&H Transport, Inc.

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

OIER

The Indiana & Ohio Rail System

eliminated 7/1994

OILX

Oil Tank Line Co.

7/1937-10/1957; eliminated 10/1960

OILX

Transcontinental Transport, Inc.

added 10/1960; 4/1961; eliminated 7/1962

OILX

North American Car Corp.

eliminated 1/1984

OILX

General Electric Railcar Services Corp.

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

OJGX

Oscar J. Glover

1/1994-7/2020 (unlisted)

OJTX

O.J. Tauber

added 7/1957; 10/1957-7/1965; eliminated 10/1965

OJTX

Tauber Transportation Co.

added 7/1978; 1/1980; eliminated 7/1984; 1/1994 (unlisted)

OK

Oklahoma Ry. Co.

7/1923-1/1941

OKAN

Okanagan Valley Ry. Co.

7/2000-7/2020

OKCE

Okarche Central Ry., Inc.

added 10/1982; eliminated 1/1983

OKCX

OKC Corp.

added 4/1980; eliminated 10/1981

OKCX

Louisiana Cement Co., Inc.

added 10/1981; eliminated 7/1983

OKCX

Lone Star Industries, Inc.

added 7/1983; 1/1994-7/2000; eliminated 1/2001; added 7/2001; 7/2005; eliminated 7/2011; 7/2020 (not listed)

OKEX

Okee, Inc.

added 7/1971; 1/1975; eliminated 7/1976

OKEX

OKEX, Inc.

added 7/1976; 1/1980; eliminated 7/1982

OKKT

Oklahoma, Kansas and Texas R.R. Co.

added 10/1980; added 1/1981; eliminated 4/1982; added 1/1983; eliminated 1/1990

OKKT

Missouri Pacific System

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

OKKT

Union Pacific R.R. Co.

added 4/1997; 7/2000-7/2020

OKLX

Oklahoma Tank Car Line

10/1966; eliminated 4/1969

OKRX

Oklahoma Railway Museum, Ltd.

added 10/2003; eliminated 1/2004; 7/2005-7/2020 (unlisted)

OLB

Omaha, Lincoln and Beatrice Ry. Co.

added 10/1974; 1/1975-7/2005; eliminated 10/2011; 7/2020

OLDX

Old Line Holding Co., Inc.

added 1/1992; 1/1994-7/2000; eliminated 10/2004; 7/2005-7/2020 (unlisted)

OLGX

INEOS Oligomers

added 1/2008; eliminated 4/2016

OLGX

INEOS Oligomers USA LLC, an affiliate of INEOS USA LLC.

added 4/2016; 7/2020

OLHX

O.L. Hoese Co. (Merchants Despatch, Inc.)

7/1935

OLI

Ogden, Logan & Idaho Ry. Co. (Utah Idaho Central R.R. Co.)

7/1923

OL&I

Ogden, Logan & Idaho Ry. Co. (Utah Idaho Central R.R. Co.)

7/1930

OLNX

Olin Corp.

added 10/1977; 1/1980-7/2005

OLNX

Olin Chlor Alkali Logistics

7/2020

OLO

Ontario L'Orignal Ry., Inc.

7/2000-7/2020

OLSX

ADM Transportation Co.

added 1/2012; 7/2020

OLTX

Overland Tank Car Co.

4/1947

OLWX

Ohio Locomotive Works LLC

7/2020 (not listed)

OLYR

The Olympic R.R. Co.

added 7/1989; 1/1994-7/2020

OLYX

Olympia Petroleum, Inc.

added 7/1980; eliminated 10/1985

OLYX

Port of Olympia

7/2020 (not listed)

OMAX

Omaha Public Power District

added 1/1978; 1/1980-7/2020

OMCX

O-M Corp.

1/1975-1/1980

OMCX

Oldcastle Materials Cement Holdings, Inc.

7/2020 (not listed)

OMID

Ontario Midland R.R. Corp.

added 1/1980; 1/1980-7/2000; eliminated 4/2005; 7/2005-7/2020

OMLP

Ohio Midland Light & Power

1/1975-1/1980

OMLX

OmniTRAX Leasing, Ltd.

7/2000-7/2020 (unlisted)

OMNX

OmniSource Corp.

added 7/2006; eliminated 10/2015; 7/2020 (not listed)

OMRX

Oscar Mayer & Co., Inc.

7/1923-7/1932

OMRX

Oscar Mayer & Co., Inc. (cars No. 2000-2044)
(General American Tank Car Corp.)

7/1935

OMRX

Oscar Mayer & Co., Inc. (cars No. 3001-3020, 4001-4020 & 5001-5025)
(Union Refrigerator Transit Co.)

7/1935

OMRX

Oscar Mayer & Co.

7/1937-4/1938

OMRX

Mather Stock Car Co.

1/1941

OMRX

Ozark Mountain Railcar LLC

7/2005-7/2020 (unlisted)

OMSX

J.T. Leasing Inc. d/b/a Ohio Mulch

7/2005-7/2020 (unlisted)

OMTX

Oscar Mayer & Co.

1/1941-1/1950

OMX

National Car Co.

1/1950-7/1954

OMX

Fruit Growers Express Co.

10/1957-4/1961

OMX

National Car Co.

eliminated 1/1963

ONCT

Ontario Central R.R. Corp.

added 1/1980; 1/1980-7/2005; eliminated 4/2012; 7/2020

ONER

Ontario Eastern R.R. Corp.

added 7/1982; eliminated 4/1986

ONEX

Oneta Refining Co.

8/1920-7/1923

ON&P

Oklahoma, New Mexico & Pacific Ry.

8/1920-7/1923

ONRY

Ogdensburg Bridge & Port Authority

1/1975

ONSX

Oglebay Norton Industrial Sands, Inc.

7/2000-7/2005 (unlisted)

ONT

Ontario Northland Railway

4/1947-7/2020

ONTA

Ontario Northland Railway

added 1/1981; 1/1994-7/2005; eliminated 4/2006

ONTA

Ontario Northland Railway (Ontario Northland Trans Commission)

7/2020

ONTX

On-Track Railcar Services, Inc.

added 4/1988; 1/1994-7/2005; eliminated 4/2012; 7/2020 (not listed)

ONW

Oregon & Northwestern R.R. Co.

1/1975; added 4/1979; 1/1980; eliminated 4/1989; eliminated 4/1990

ONWX

Orlando & NorthWestern Railway, LLC

7/2020 (not listed)

ONYX

American Colloid Co.

4/1970; added 7/1970; 1/1975-1/1980; eliminated 1/1985; eliminated 7/1985

ONYX

The Onyx Collection S-Corp

7/2020 (not listed)

OOOX

Osborne, Inc.

added 10/1997; eliminated 4/1998; 7/2000-7/2020 (unlisted)

OORX

Opelousas Oil Refinery

4/1947 (unlisted); 1/1950

OORX

Chartrand's Traffic Service

1/1952; eliminated 7/1953

OORX

Chartrand's Tank Car Service

added 7/1953; 7/1954-10/1957; eliminated 1/1958

OORX

Chartrand's Tank Car Rentals

added 1/1958; eliminated 4/1958

OORX

Chartrand's Tank Car Service

added 4/1958; eliminated 10/1958

OORX

Chartrand's Tank Car Service, Inc.

added 10/1958

OORX

Chartrand's Traffic Service

eliminated 10/1959

OPAX

Oxford Paper Co.

added 4/1954; 7/1954

OPAX

Oxford Paper Co., Inc.

10/1957; eliminated 1/1959

OPAX

Oxford Paper Co.

added 1/1959; eliminated 10/1959

OPCX

Fruit Growers Express Co.
(reporting marks for Omaha Packing Co.)

7/1937-1/1950

OPCX

The Olympic Portland Cement Co., Ltd.

added 4/1954; 7/1954-10/1957; eliminated 7/1959

OPCX

Permanente Cement Co.

added 7/1959; 4/1961; eliminated 10/1961

OPCX

General Electric Railcar Services Corp.

added 7/1987; eliminated 1/1988

OPCX

Organic Polymer Co. LLC

7/2020 (not listed)

OPE

Oregon Pacific and Eastern Ry. Co.

1/1975-1/1980; eliminated 1/1994; 1/1994 (unlisted); eliminated 4/1995; 7/2000-7/2020

OPFX

Cia Occidental de Productos Forestales, S.A.

1/1945-4/1947

OPGX

Oklahoma Petroleum & Gasoline Co.

8/1920

OPIX

OXY Petrochemicals Inc.

added 7/1990

OPIX

OXY NGL, Inc.

eliminated 1/1991

OPIX

OXY USA Inc.

added 1/1991

OPIX

OXY Petrochemicals Inc.

eliminated 4/1991

OPIX

Occidental Chemical Corp., Petrochemicals Division

added 4/1991; eliminated 1/1992

OPIX

Occidental Chemical Corp.

added 1/1992; 1/1994; eliminated 10/1998

OPIX

Equistar Chemicals, LP

added 10/1998; 7/2000-7/2020

OPKX

Onalaska Pickle & Canning Co.

7/1935

OPPX

Oppenheimer Casing Co.

7/1932

OPPX

Oppenheimer Casing Co.
(Union Refrigerator Transit Co.)

7/1935

OPPX

Omaha Public Power District

added 7/1994; 7/2000-7/2020

OPR

Oregon Pacific R.R. Co.

7/2000-7/2020

OPSX

Public Service Co. of Oklahoma

added 1/1979; 1/1980-7/2020

OPT

Orange Port Terminal Ry.

7/2000-7/2020

OPX

The Ohio Power Co.

1/1943-10/1957; eliminated 10/1958

OPX

Ohio Power Co.

added 10/1958; 4/1961-7/2005; eliminated 4/2014

OPX

AEP Generation Resources Inc.

added 4/2014; 7/2020

OR

Owasco River

1/1975-1/1980

ORA

Ormet R.R. Corp.

7/2000-7/2005

ORC

Ogeechee Railroad Co.

7/2020

ORCX

The Neatesfoot Oil Refineries Corp.

7/1935

ORCX

Oklahoma Refining Co.

7/1937-4/1938

OREX

Omaha Refining Co.

8/1920

OREX

REA Express

added 10/1970

OREX

REA Express,
owned and operated by Railway Express Agency, Inc.

eliminated 1/1971

OREX

REA Express, Inc.

added 10/1970; added 1/1971; eliminated 4/1974

OREX

Oregon Dept. of Agriculture

1/1994-7/2020 (unlisted)

ORHX

Oscar R. Howard

7/1923-1/1941

ORHX

Howard Tank Line

1/1943-7/1965; eliminated 7/1966

ORMX

D.L. Orme

1/1952-10/1966; eliminated 1/1970

OROX

U.S. Atomic Energy Commission

added 10/1969; 4/1970-1/1975

OROX

U.S. Atomic Energy Commission,
Oak Ridge Operations Office

eliminated 4/1975

OROX

United States Energy Research and Development Administration, Oak Ridge Operations Office

added 4/1975; eliminated 1/1978

OROX

U.S. Dept. of Energy, Oak Ridge Operations Office

added 1/1978; 1/1980-1/1994; eliminated 7/1995; 7/2000-7/2005 (unlisted)

ORPX

Orient Petroleum Co.

7/1930

ORPX

Orient Petroleum Co. (Atlantic-Pacific & Gulf Refining Co.)

7/1932-7/1935

ORPX

O.E. Linsin, Inc.

7/1937 (unlisted)

ORR

Osage R.R.

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

ORRX

Oregon Dept. of Transportation/Rail Division

added 10/2003; 7/2005; eliminated 1/2007

ORSX

Oxweld Railroad Service Co.

1/1941-4/1961 (unlisted)

ORTX

O & R Transport, Inc.

7/2005-7/2020 (unlisted)

ORXX

Norden Video Inc.

7/2020 (not listed)

OS

Ontario Southland Ry. Inc.

7/2005-7/2020

OSCR

Indiana Eastern Railroad, LLC d/b/a Ohio South Central Railroad

7/2020

OSCX

Oil Seeds Co.

8/1920-7/1923

OSGX

Oil State Gasoline Co.

8/1920-7/1923

OSKX

Oil States Tank Car Corp.

7/1935

OSKX

Mid-Continent Petroleum Corp.

7/1937-7/1954

OSKX

D-X Sunray Oil Co.

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

OSKX

Sunray D-X Oil Co.

added 7/1962; 7/1965

OSKX

Oil States Tank Car Corp. (Sunray D-X Oil Co.)

10/1966

OSKX

Sunray D-X Oil Co.

eliminated 10/1967

OSNX

Osnabrook Farmers Cooperative Elevator

added 1/2008; eliminated 4/2008; 7/2020 (not listed)

OSO

Ocilla Southern R.R. Co.

7/1923

OSRR

Ohio Southern R.R., Inc.

added 10/1987

OSRR

Ohio R.R. System

eliminated 10/1992

OSRR

The Columbus & Ohio River R.R. Co.

added 10/1992

OSRR

Ohio Southern R.R., Inc.

1/1994-7/2005

OSRR

Ohio Central Railroad

7/2020

OSRX

Oil State Refining Co.

8/1920-7/1923

OSRX

Ontario Southland Ry. Inc.

7/2000 (unlisted)

OSRX

Ontario Southland Inc.

7/2005-7/2020 (unlisted)

OSTX

New York Oil Storage & Transfer Co.

8/1920

OT

Oregon Trunk Ry. (Spokane, Portland & Seattle Ry. Co.)

7/1923-7/1935

OT

Oregon Trunk Ry.

4/1938-7/1965

OT

Oregon Trunk Ry. (Spokane, Portland & Seattle Ry. Co.)

10/1966

OT

Oregon Trunk Ry.

1/1975-1/1980

OTCO

Owensville Terminal Co., Inc.

7/2000-7/2020

OTCR

Oakdale Traction Corp.

7/2005-7/2020

OTDX

O-T-D Corp.

added 4/1958; 4/1961-1/1975; eliminated 1/1980

OTDX

Greenbrier Leasing Corp.

added 1/1980; 1/1980-7/2000; eliminated 7/2005

OTDX

Greenbrier Management Services, LLC

added 7/2005; 7/2005-7/2020

OTEX

Otex Tank Car Co.

1/1943-1/1946

OTOX

Otto Milk Co.

7/1935-4/1947

OTPX

Otter Tail Power Co.

7/1930-10/1957; eliminated 10/1959

OTR

The Oakland Terminal Ry.

1/1975-7/2005; eliminated 10/2010; 7/2020

OTRX

On-Track Railway Services Ltd.

7/2000-7/2020 (unlisted)

OTSX

On-Track Rail Services, LLC

7/2000-7/2005 (unlisted)

OTT

Ottumwa Terminal R.R. Co.

added 1/1988; eliminated 7/1990; 1/1994-7/2005

OTTX

Trailer Train Co.

7/1965 (unlisted); added 10/1965; 10/1968-1/1980; eliminated 1/1992

OTTX

TTX Co.

added 1/1992; 1/1994-7/2020

OTVR

Otter Tail Valley R.R. Co., Inc.

added 4/1987; 1/1994; eliminated 10/1999; 7/2000-7/2020

OTWX

Of the Woods, LLC

7/2020 (not listed)

OTX

Oliver Tank Line

7/1923

OUCH

Ouachita R.R.

added 4/1991; 1/1994-7/2020

OUCX

Orlando Utilities Commission

added 1/1987; 1/1994-7/2020

OURD

The Ogden Union Ry. and Depot Co.

1/1975-7/2020

OVEX

Ohio Valley Electric Co.

added 1/1997; 7/2000-7/2005; eliminated 7/2016

OVOX

Oriental Vegetable Oils Co., U.S.A. (W.R. Grace & Co.)

7/1930-7/1935

OVOX

W.R. Grace & Co.

7/1935-1/1952; eliminated 1/1954

OVOX

Grace & Co. (Pacific Coast)

added 1/1954; 7/1954; eliminated 1/1957

OVR

Ohio Valley R.R. Co.

7/2005-7/2020

OVRR

Ozark Valley Railroad Inc.

7/2020

OVRX

Ohio Valley Refining Co.

8/1920-7/1930

OVTX

Ohio Valley Tank Line

7/1937-4/1947 (unlisted)

O&W

New York, Ontario & Western Ry. Co.

8/1920 & 7/1930-7/1936

OW

New York, Ontario & Western Ry. Co.

7/1923-7/1930

OW

New York, Ontario & Western Ry.

4/1938-7/1954

OWIX

Owens-Illinois Glass Co., Mill Division

added 4/1959; 4/1961; eliminated 1/1964

OWIX

Old World Industries Ltd.

added 1/2001; eliminated 4/2001

OWIX

Old World Transportation, Ltd.

added 4/2001; 7/2005

OWSX

Oil Well Supply Co. (1980) Ltd.

7/2000-7/2005 (unlisted)

OWTX

Oneida & Western Transportation

1/1980

OWTX

Shamrock Coal Co., Inc.

added 1/1983; eliminated 10/1991

OXAX

OXEA Corp.

added 7/2007; eliminated 7/2020

OXAX

OQ Chemicals Corp.

added 7/2020; 7/2020 (not listed)

OXFX

Oxford Construction Co.

7/2020 (not listed)

OYLO

Olympia & Belmore Railroad, Inc.

7/2020 (not listed)

OYLR

The Olympic R.R. Co.

eliminated 7/2008

OZCX

Ozark Chemical Co.

7/1937-1/1941 (unlisted); 1/1943-4/1947

OZCX

Ozark-Mahoning Co.

1/1950-4/1970; eliminated 7/1972

OZKX

Ozark Car Corp.

7/1932

OZKX

Ozark Car Corp. (Deep Rock Oil Corp.)

7/1935

OZKX

Deep Rock Oil Corp.

7/1937-1/1950

OZKX

Ozark Tank Car Co.

1/1952-4/1961; eliminated 7/1962

OZKX

Union Tank Car Co.

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

OZX

Ozone Co., Inc.

7/1937-10/1966; eliminated 1/1967