REPORTING MARK SUFFIXES

X	PRIVATE CAR OWNERS
U	CONTAINERS
Z	TRAILERS

U	   UNION RAILWAY (SOUTHERN RWY. QUEEN & CRESCENT ROUTE)
UAAX	   AMERICAN ACID CO.
UAC	   UNITED AIRCRAFT CORP.
UACU       UNITED ARAB SHIPPING CO.
UACX	   UNIVERSAL ATLAS CEMENT DIV., U.S. STEEL CORP.
UAEU       UNITED ARAB SHIPPING CO (S.A.G.)
UAIX       UNITED ASPHALTS INC.
UASU       UNITED ARAB SHIPPING CO.
UASX	   UNITED ALLOY STEEL CORP.
UASZ       UNITED ARAB SHIPPING CO.
UAWX	   *STANDARD WHOLESALE PHOSPHATE & ACID WORKS, INC. [UNION ACID WORKS, INC.]
UAWX	   *MATHIESON CHEMICAL CORP.
UB         UNION BELT OF DETROIT
UBCU       UNITED FRUIT CO.
UBEX	   UNITED BIO ENERGY INGREDIENTS, LLC
UBFL       UNITED - BUCKINGHAM FRT LINES
UBMU       UNITED BALTIC CORP. LTD.
UBTX       UNION CAMP CORP. [UNION BAG & PAPER CORP.]
UCAU       UCA CONTAINERS AG
UCBX	   ASHLAND CHEMICAL CO., CARBON BLACK & SYNTHETIC RUBBER DIV. 
	   [UNITED CARBON CO.]
UCBZ	   UNITED COOP OF BIGELOW
UCC	   UNION CARBIDE CORPORATION, CARBON PRODUCTS DIV.
UCCU       AMERICAN CYANAMID
UCCX	   *UTAH COPPER CORP.
UCCX	   *UNITED CONTRACTING CO.
UCCX       +UNION CARBIDE CANADA LTD.
UCCZ	   UNION CAMP CORP.
UCEX       UNION ELECTRIC CO.
UCFX       UNION CARBIDE CORP.(THE DOW CHEMICAL CO. U.S.A.) 
UCIR       UNION COUNTY INDUSTRIAL RAILROAD CO.
UCIX       UNICHEMA CHEMICALS INC
UCKX	   BETHLEHEM STEEL CO. [UNION COAL & COKE CO.]
UCLD       UNVIERSAL CARLOADING & DISTRIBUTING CO
UCLU       UNICORN LINES (PTY) LTD.
UCLX       OCCIDENTAL CHEMICALS CORP. [BASIC CHEMICALS CO., LLC; VULCAN
	   MATERIALS CO. CHEMICALS DIV.; UNION CHEMICAL CARLINE INC.]
UCM	   UNION CARBIDE (WEST VIRGINIA)
UCMX       UNITED CLAYS, INC.
UCOX       PRAXAIR INC. [UNION CARBIDE CORP.]
UCPX       ESSEM CORP. - UNION CARBIDE CORP., LESSEE
UCR        UTAH COAL ROUTE
UCRS       UPPER CANADA RWY SOCIETY
UCRY       UTAH CENTRAL RW CO.
UCSX       INTERNATIONAL PAPER CO. [UNION CAMP CORPORATION]
UCX	   CUMBERLAND & PENNSYLVANIA RAILROAD (UNITED COAL CORP.)
	   [HILLMAN COAL & COKE CO.]
UDAX	   UNITED DISTILLERS OF AMERICA, INC. (NORTH AMERICAN CAR CORP.)
UDC	   UNION DEPOT COMPANY - COLUMBIA, OHIO
UDIX	   UTILITIES DISTRIBUTORS, INC. [UTILITIES TRANSPORT CO.]
UDTZ	   UPPER DEERFIELD TOWNSHIP NEW JERSEY
UDX	   UNITED DAIRY CO., INC.
UE	   UNION ELECTRIC RWY.
UECZ	   UNION ELEVATOR CO.
UEEZ	   UNION EQUITY ELEVATOR CO.
UEFZ	   UNION EQUITY
UELX       *UNITED EQUIPMENT LEASING ASSOCIATES
UELX       +ADM TRANSPORTATION CO. (ARCHER DANIELS MIDLAND)
UELZ	   UNITED ELECTRIC CO.
UESX	   JOHNSTOWN AMERICA CORP. - REGISTRATION ELIMINATED 2011
UFC        UNITED FRUIT CO
UFCC       FLEXI-VAN LEASING, INC. (REGISTRATION ELIMINATED NOV. 1997)
UFCU       FLEXI-VAN LEASING, INC. / EVERGREEN MARINE CORP.
UFCZ       *FLEXI-VAN LEASING, INC.
UFCZ	   *U. S. FUEL CO.
UFGX	   UNITED FUEL GAS CO.
UFIX       *UTILITY FUELS INC.
UFIX       +NRG ENERGY, INC. [TEXAS GENCO; [RELIANT ENERGY; HOUSTON LIGHTING &
	   POWER COMPANY]
UFIZ	   U.F.I. CORP
UFPZ	   UNIVERSAL FOREST PRODUCTS
UFTX	   *RESIDCO
UFTX	   +THE DAVID J. JOSEPH CO.
UGEZ	   UNITED GRAIN ELEVATOR 2
UGMU       EVERGREEN INTERNATIONAL (USA) CORP.
UGPX	   UNITED GAS PIPE LINE CO.
UGSX	   UNITED GAS PUBLIC SERVICE CO.
UHRX	   UPPER HUDSON RIVER RAILROAD CORP.
UIC	   *UTAH IDAHO CENTRAL RAILROAD CO.
UIC        *MARCHEM LTD
UIMX	   UNITED IRON & METAL LLC
UISZ	   USCO UNDUSTRY SASKATHEWAN
UIWX       RILEY STOKER CORP. [UNION IRON WORKS]
UIZ	   ULEN INDUSTRIES
UKKX	   UNITED CARBON CO.
ULCX	   UNIT LOAD CAR CORP.
ULCZ	   ULRIZH CEMENT CO.
ULS        RETIRED 05-15-92 TP (0806)
UMP        UPPER MERION & PLYMOUTH RAILROAD CO.
UMPX       *FIRST UNION RAIL [UPPER MERION & PLYMOUTH LEASING CO.]
UMPX	   +WELLS FARGO RAIL CORP.
UMSX	   UNITED STEELWORKERS OF AMERICA
UMSZ       INTERMODAL SERVICES, INC.
UNBX	   *UNION BOILER REPAIR
UNBX	   +GENERAL ELECTRIC RAIL SERVICES CORP.
UNCX	   *CROWN CENTRAL PETROLEUM CO. [UNITED CENTRAL OIL CORP.]
UNCX	   *UNIVERSAL CAR CO.
UNCX	   *UNION CARBIDE CANADA, LTD.
UNCX       +GATX RAIL CANADA CORP. [GENERAL ELECTRIC RAILCAR SERVICES CORP.]
UNCZ	   UNIVERSAL COOPERATIVE
UNEZ	   UNION ELECTRIC
UNFX	   AMERICAN RAILCAR INDUSTRIES
UNI        UNITY RAILWAYS
UNIX	   *UNIGAS, INC.
UNIX	   +UNIFIED ENVIRONMENTAL SERVICES GROUP LLC
UNIZ	   UNITED INDUSTRIES
UNLX	   BOARD OF REGENTS OF THE UNIVERSITY OF NEBRASKA
UNPX       (PROX) PROCOR LTD [UNION TANK CAR CO.; SINCLAIR REFINING CO.;
	   UNION PETROLEUM CO.]
UNRZ	   UNIVERSITY OF NORTH CAROLINA RAILROAD
UNSX       *UNITRAIN SERVICES (AGENT FOR IOWA POWER & LIGHT)
UNSX       *MIDAMERICAN ENERGY COMPANY [(IOPRX) MIDWEST POWER SYSTEMS]
UNSX	   +RAIL LOGISTICS LC [RAILCAR CUSTOM LEASING, LLC; JAIX LEASING CO.]
UNTX       *RAILCAR CUSTOM LEASING, LLC  [JAIX LEASING CO.; MRC RAIL SERVICES LLC; 
	   UNITRAIN, INC.]
UNTX	   +MACQUARIE RAIL, INC. (REPORTING MARK ELIMINATED 2011)
UNVX	   *UNIVERSAL CORP.
UNVX	   +UNIVAR CANADA LTD.
UNXX       CROWS NEST RESOURCES LTD
UO         RETIRED 08-23-93 ATP (000) [UNION RAILROAD OF OREGON]
UOCX       GENERAL AMERICAN MARKS CO. [(GATC) GENERAL AMERICAN TRANSPORTATION CORP] 
	   UNION OIL CO. of CALIF.)
UOEX       UNO-VEN [UNOCAL; UNION OIL CO. OF CALIFORNIA]
UOGX	   UNITED OIL & NATURAL GAS PRODUCTS CORP.
UOGZ	   UNIVERSITY OF GEORGIA
UOKX	   BRITISH AMERICAN OIL CO. [UNION OIL CO.]
UOPX       UOP A NEW YORK PARTNERSHIP [UNION OIL CO.]
UP         UNION PACIFIC RAILROAD CO.
UPAX	   *UTAH POULTRY PRODUCERS COOPERATIVE ASSOCIATION REFRIGERATOR LINE
UPAX       *GREAT RIVER ENERGY [UNITED POWER ASSOCIATION]
UPB	   UNION PACIFIC RAILROAD
UPBZ       UNION PACIFIC RAILROAD CO.
UPCU       (UPCX) USPCI, INC.
UPCX	   *UNIVERSAL ATLAS CEMENT CO. [UNIVERSAL PORTLAND CEMENT CO.]
UPCX	   *HOME PETROLEUM CORP. [UNION PETROLEUM CORP.]
UPCX       +CLEAN HARBORS ENVIRONMENTAL SCIENCES, INC [LAIDLAW ENVIRONMENTAL
	   SERVICES INC.; USPCI, INC.]
UPEX	   UNITED LIQUID GAS CO. dba UNITED PACIFIC ENERGY
UPFE       UNION PACIFIC RAILROAD CO. [PACIFIC FRUIT EXPRESS]
UPFU       (UPUU) UNION PACIFIC BULKTAINER SERVICE
UPFX	   UNITED STATES PIPE & FOUNDRY CO.
UPFZ	   UNION PACIFIC FRUIT EXPRESS CO.
UPHU	   UNION PACIFIC RAILROAD CO.
UPIX	   USS-POSCO INDUSTRIES
UPM	   UNION PACIFIC RAILROAD, MILWAUKEE ROAD OPERATIONS
UPNZ       UNION PACIFIC RAILROAD CO.
UPOZ       UNITED PARCEL SERVICE
UPP        UNION PACIFIC RAILROAD CO. (PASSENGER CARS)
UPPX	   TRANSCONTINENTAL OIL CO. [UNITED PRODUCERS PIPE LINE CO.]
UPR        UNION PACIFIC RAILROAD CO.
UPRQ       UNION PACIFIC RAILROAD CO.
UPRR       UNION PACIFIC RAILROAD CO.
UPRU       UNION PACIFIC RAILROAD CO.
UPRX	   *PENNSYLVANIA-CONLEY TANK LINE, DIV. GENERAL AMERICAN 
	   TRANSPORTATION CORP. [ULTRA-PENN REFINING CO.]
UPRX       *UNION PACIFIC FRUIT EXPRESS CO.
UPS	   UNION PACIFIC RAILROAD, SLUGS
UPSH       UPSHAW, SCOTT TRANSPORTATION
UPSW       UPSHAW TRUCKING
UPSZ       UNITED PARCEL SERVICE
UPT	   UNION PACIRIC RAILROAD, FUEL TENDERS
UPTU       (UPUU) UNION PACIFIC BULKTAINER SERVICE
UPUU       UNION PACIFIC BULKTAINER SERVICE
UPWZ       UNITED PARCEL SERVICE
UPX	   UNITY PETROLEUM CORP.
UPY	   UNION PACIFIC RAILROAD CO., YARD SWITCHERS
UPZ        UNION PACIFIC RAILROAD CO.
URC	   UNITED RAILWAYS CO. (SPOKANE, PORTLAND & SEATTLE RWY.)
URCX	   UNITED REFINING CO.
URDX       ARCH OF KENTUCKY INC. {UNITED STATES STEEL CORP., RESOURCE DEVELOPMENT GROUP]
URGX       UNICAPITAL RAIL GROUP
URHX	   UNITED RAILWAY HISTORICAL SOCIETIES OF NEW JERSEY
URMX	   *UNION REFRIGERATOR TRANSIT LINES, DIV. GENERAL AMERICAN
	   TRANSPORTATION CORP.
URMX	   +UNITRAC RAILROAD MATERIALS INC.
URR        UNION RAILROAD CO. (PITTSBURGH, PA)
URSC	   UNITED RAILWAY SUPPLY CO.
URTX       (GATX) RETIRED 08-19-92 ATP (1631) [UNION REFRIGERATOR TRANSIT LINES]
URWX       UNITED RIGHT-OF-WAY
URY        UNION RAILWAY OF MEMPHIS
USA        U.S. DEPT. OF DEFENSE - ARMY, MIL. TRFC. MGMT. & TERM. SERV.
USAF	   U.S. DEPT. OF DEFENSE - AIR FORCE
USAT	   U.S. DEPT. OF DEFENSE - ARMY TRANSPORTATION CORP.
USAU       PAN TEXAS LEASING INC.
USAX	   *UNITED STATES ASPHALT REFINING CO.
USAX       +DEPARTMENT OF ARMY, MILITARY TRAFFIC MANAGEMENT & TERMINAL SERVICE 
	   (U.S. DEPT. OF DEFENSE - U. S. ARMY TROOP SUPPORT & AVIATION MATERIAL 
	   READINESS COMMAND (INTRA PLANT SERVICES))
USAZ       (XTRZ) XTRA INTERMODAL
USBX	   *U.S. BORAX & CHEMICAL CORP.
USBX       +THE CIT GROUP/CAPITAL FINANCE INC. [(NATX) GENERAL ELECTRIC 
	   RAILCAR SERVICES CORPORATION]
USC	   UNITED STOCKYARDS CORP.
USCU       UNION STEAM SHIP CO. OF NZ LTD.
USCX       WILLIAM G. SIMON TANK CAR MANAGEMENT [UNITED STATES TANK CAR CORP.;
	   UNITED STATES COAL & COKE CO.]
USCZ	   U. S. REDUCTION COMPANY, INC.
USEX       (NATX) GEN. ELECTRIC RAIL SERVICES CORP. [ITEL RAIL CORP.; EVANS
	   RAILCAR LEASING CO.; UNITED STATES RAILWAY LEASING CO.]
USFU       U.S. DEPT. OF DEFENSE - AIR FORCE
USFX	   *U.S. FOOD PRODUCTS CAR LINE CORP.
USFX	   *STRICK DIV., FRUEHAUF CORP.
USG	   UNITED STATES GYPSUM
USGX       *HOLLY SUGAR CORPORATION [UNION SUGAR COMPANY] 
USGX	   +US MAGNESIUM LLC
USIC       U.S. INTERMODAL CORP.
USIX       EQUISTAR CHEMICALS LP [QUANTUM CHEMICAL CORPORATION, US INDUSTRIAL
	   CHEMICALS DIV.; US INDUSTRIAL ALCOHOL CO.]
USIZ	   UNITED STATES SILICA
USLD	   DETROIT, TOLEDO & IRONTON RAILROAD CO.
USLF	   BURLINGTON NORTHERN RAILROAD [ST. LOUIS-SAN FRANCISCO RWY. CO.]
USLU       UNITED STATES LINES, INC.
USLX       *(NATX) GENERAL ELECTRIC RAIL SERVICES CORP. [ITEL RAIL CORP.;
	   EVANS RAILCAR LEASING; UNITED STATES RAILWAY LEASING CO.]
USLX	   +WELLS FARGO RAIL CORP.
USLZ       UNITED STATES LINES, INC.
USMN	   U. S. STEEL MINING RAILROAD
USMR	   UNITED STATES METALS REFINING
USMU       U.S. DEPARTMENT OF DEFENSE - MARINE CORPS
USMX       U.S. STEEL MINING COMPANY INC.
USMZ	   U.S. DEPARTMENT OF DEFENSE - MARINE CORPS
USNC       UNITED STATES NAVIGATION CO INC
USNU       U.S. NAVY
USNX       DEPARTMENT OF ARMY, MILITARY TRAFFIC MANAGEMENT & TERMINAL SERVICE 
	   (U.S. DEPT. OF DEFENSE - U. S. ARMY TROOP SUPPORT & AVIATION MATERIAL 
	   READINESS COMMAND (INTRA PLANT SERVICES))
USNZ	   U.S. DEPARTMENT OF DEFENSE - NAVY
USOX       U.S. DEPARTMENT OF DEFENSE - ARMY
USOZ	   U. S. STEEL MINNESOTA ORE OPERATIONS
USP	   U.S. DEPARTMENT OF DEFENSE - PORTSMOUTH NH NAVAL YARD
USPC       (UPCX) USPCI, INC.
USPF	   UNITED STATES PINE FOUNDRY
USPX	   *U. S. PHOSPHORIC PRODUCTS, DIV. TENNESSEE CORP.
USPX	   *U. S. PIPE & FOUNDRY CO.
USPX       *U. S. PLASTICS CORPORATION
USPZ       U.S. POSTAL SERVICE
USQX       U.S. DEPARTMENT OF DEFENSE - ARMY
USR	   UTAH SOUTHERN RAILWAY CO. LLC
USRP       U.S. RAIL CORP. LLC
USRX	   *UNIROYAL, INC. [UNITED STATES RUBBER CO.]
USRX	   *U. S. ROAD & RAIL - MELVINDALE INC.
USRX       +U. S. RAILWAYS INC. [U.S. RAILCAR, INC.]
USRZ	   U. S. RECYCLING CO.
USSC	   UNITED STATES STEEL CORP.
USSU       UNITED STEEL & STRIP CORP.
USSX	   *UNITED STATES OF AMERICA
USSX	   *UNITED STATES SUGAR CORP.
USSX       +U.S. STEEL CORP. (ARISTECH CHEMICAL CORP.)
USSZ	   UNITED STATES SUGAR CO.
USTG	   UNITED STATES GOVERNMENT (FEDERAL RAILROAD ADMINISTRATION)
USTX	   *UNION STARCH & REFINING CO. (GENERAL AMERICAN TRANSPORTATION CORP.)
USTX	   *USX CORP.
USWX       USA WASTE SERVICES INCORPORATED OF NYC
USYT	   UNION STOCK YARD & TRANS. CO. OF CHICAGO
UT         MISSOURI PACIFIC SYSTEM [UNION TERMINAL RY (ST. JOSEPH, MO)]
UTAH       UTAH RAILWAY CO.
UTAX	   *UNITED TRANSPORTATION, INC.
UTAX	   *UTAH TRANSIT AUTHORITY
UTBX       (UTCX) UNION TANK CAR CO.
UTCO	   UNION TRACTION CO.
UTCR       UNITED TRANS CO OF R I
UTCU       STOLT TANK CONTAINERS INC.
UTCX       UNION TANK CAR CO
UTD	   UNION TERMINAL CO. (DALLAS, TX)
UTDC	   TRI-COUNTY COMMUTER RAIL AUTHORITY {UTDC TRANSIT SERVICES, INC.}
UTHZ       TRANSAMERICA LEASING INC.
UTLX       (UTCX) UNION TANK CAR CO
UTLZ       UNITED TRAILER LEASING CO
UTPX	   *UNION TEXAS PETROLEUM CORP. 
UTPX       +SUBURBAN PROPANE - DIV. QUANTUM CHEMICAL CORP. 
	   [UNION TEXAS PRODUCTS CORP.]
UTR        RETIRED 04-26-94 FXD [UNION TRANSPORTATION CO.]
UTRS       UNITED TRUCKING SERV.
UTSZ	   TRI-COUNTY COMMUTER RAIL AUTHORITY {UTDC TRANSIT SERVICES, INC.}
UTTX       TTX CO.
UTX        UNION TANK CAR CO.
UUAX       UP-UP & AWAY INC.
UUUZ       UITERWYK CORP.
UV         UNADILLA VALLEY RY
UX	   UNITED STATES FUEL CO.
UYLU       UNITED YUGOSLAV LINES (KERR STEAMSHIP CO AGENTS)
UYLZ       UNITED YUGOSLAV LINES