EXHIBIT 21
TRINITY INDUSTRIES, INC.
Subsidiaries as of December 31, 2004
Organized | Ownership | ||||||||||
Name of Subsidiary | Under Laws of | Percentage | |||||||||
Apromat, S.A. — Arad | Romania | 50% | |||||||||
Astra Vagoane Arad, S.A. | Romania | 96% | |||||||||
ICPV, S.A. — Arad | Romania | 89% | |||||||||
International Industrial Indemnity Company | Vermont | 100% | |||||||||
Reunion General Agency, Inc. | Texas | 100% | |||||||||
Syro, Inc. | Ohio | 100% | |||||||||
Transit Mix Concrete & Materials Company | Delaware | 100% | |||||||||
Transit Mix Concrete — Baytown, Inc. | Texas | 100% | |||||||||
Transit Mix Transportation Services, LLC | Delaware | 100% | |||||||||
Transit Mix Concrete & Materials Co. of Louisiana | Delaware | 100% | |||||||||
Trinity Argentina S.R.L. | Argentina | 100% | |||||||||
Trinity EE, Inc. | Delaware | 100% | |||||||||
Trinity Equipment Co., Inc. | Delaware | 100% | |||||||||
Trinity Fittings Group, Inc. | Delaware | 100% | |||||||||
Trinity Industries Buffalo, Inc. | Delaware | 100% | |||||||||
Trinity Industries International, Inc. | Delaware | 100% | |||||||||
Trinity Industries International Holdings AG | Switzerland | 100% | |||||||||
Administradora Especializada, S. de R.L. de C.V. | Mexico | 100% | |||||||||
Grupo Tatsa, S. de R.L. de C.V. | Mexico | 100% | |||||||||
Trinity Ind. de México, S. de R.L. de C.V. | Mexico | 100% | |||||||||
OFE, S. de R.L. de C.V. | Mexico | 100% | |||||||||
Asistencia Profesional Corporativa, S.de R.L. de C.V. | Mexico | 100% | |||||||||
Servicios Corporativos Tatsa, S. de R.L. de C.V. | Mexico | 100% | |||||||||
Trinity Industries do Brasil, Ltda. | Brazil | 100% | |||||||||
Trinity Industries GmbH | Switzerland | 100% | |||||||||
Wagonmarket, spol. s r.o. | Slovak Republic | 100% | |||||||||
Trinity Industries Leasing Company | Delaware | 100% | |||||||||
Transport Capital, LLC | Delaware | 100% | |||||||||
Trinity Financial Services, Inc. | Delaware | 100% | |||||||||
Trinity Marks Company | Delaware | 100% | |||||||||
TILX GP II, LLC | Delaware | 100% | |||||||||
Trinity Rail Leasing II L.P. | Texas | 1% | |||||||||
TILX LP II, LLC | Delaware | 100% | |||||||||
Trinity Rail Leasing II L.P. | Texas | 99% | |||||||||
Trinity Rail Leasing Trust II | Delaware | 100% | |||||||||
TILX GP III, LLC | Delaware | 100% | |||||||||
Trinity Rail Leasing III L.P. | Texas | 1% | |||||||||
TILX LP III, LLC | Delaware | 100% | |||||||||
Trinity Rail Leasing III L.P. | Texas | 99% | |||||||||
TILC Equity OP GP III-C, LLC | Delaware | 100% | |||||||||
TILC Equity OP III-C L.P. | Texas | 1% |
Organized | Ownership | ||||||||||
Name of Subsidiary | Under Laws of | Percentage | |||||||||
TILC Equity OP LP III-C, LLC | Delaware | 100% | |||||||||
TILC Equity OP III-C L.P. | Texas | 99% | |||||||||
TILC Equity OP GP III-D, LLC | Delaware | 100% | |||||||||
TILC Equity OP III-D, L.P. | Texas | 1% | |||||||||
TILC Equity OP LP III-D, LLC | Delaware | 100% | |||||||||
TILC Equity OP III-D, L.P. | Texas | 99% | |||||||||
Trinity Marine Leasing, Inc. | Delaware | 100% | |||||||||
TILX GP IV, LLC | Delaware | 100% | |||||||||
Trinity Rail Leasing IV LP | Texas | 1% | |||||||||
TILX LP IV, LLC | Delaware | 100% | |||||||||
Trinity Rail Leasing IV LP | Texas | 99% | |||||||||
Trinity Industries Real Properties, Inc. | Delaware | 100% | |||||||||
Trinity Industries Transportation, Inc. | Texas | 100% | |||||||||
Trinity Marine Products, Inc. | Delaware | 100% | |||||||||
Trinity Materials, Inc. | Delaware | 100% | |||||||||
Trinity Mining Services, Inc. | Delaware | 100% | |||||||||
Trinity Rail Group, LLC | Delaware | 100% | |||||||||
Trinity Rail de Mexico, S. de R.L. de C.V. | Mexico | 100% | |||||||||
Thrall Vagonka Studénka, a.s. | Czech Republic | 95% | |||||||||
Thrall International Holdings LLC | Illinois | 100% | |||||||||
Trinity Rail UK | Engl. & Wales | 100% | |||||||||
Thrall Car Grantor Corporation | Delaware | 100% | |||||||||
Thrall Company | Delaware | 100% | |||||||||
Rail Project, s r.o. | Slovak Republic | 100% | |||||||||
Thrall Trinity Freight Car, Inc. | Delaware | 100% | |||||||||
DIFCO, Inc. | Ohio | 100% | |||||||||
Trinity Metals, s r.o. | Czech Republic | 100% | |||||||||
Trinity Rail Components & Repair, Inc. | Delaware | 100% | |||||||||
McConway & Torley Corporation | Pennsylvania | 100% | |||||||||
McConway & Torley — Anniston, Inc. | Delaware | 100% | |||||||||
Standard Forged Products, Inc. | Delaware | 100% | |||||||||
Trinity Railcar Repair, Inc. | Delaware | 100% | |||||||||
Trinity Rail GmbH | Switzerland | 100% | |||||||||
Trinity Tank Car, Inc. | Delaware | 100% | |||||||||
Trinity Rail, Inc. | Delaware | 100% | |||||||||
Trinity Rail Management, Inc. | Delaware | 100% | |||||||||
TILX GP I, LLC | Delaware | 100% | |||||||||
Trinity Rail Leasing I L.P. | Texas | 1% | |||||||||
TILX LP I, LLC | Delaware | 100% | |||||||||
Trinity Rail Leasing I L.P. | Texas | 99% | |||||||||
Trinity Structural Towers, Inc. | Delaware | 100% | |||||||||
TRN Investment Company, Inc. | Delaware | 100% | |||||||||
TRN, Inc. | Delaware | 100% | |||||||||
TRN Business Trust | Delaware | 100% |