EXHIBIT 21
TRINITY INDUSTRIES, INC.
Listing of Subsidiaries of the Registrant
The Registrant has no parent.
At May 19, 2004, the operating subsidiaries of the Registrant were:
| Percentage of | |||||||||
| voting securities | |||||||||
| owned by the | |||||||||
| Name of subsidiary | Organized in | Registrant | |||||||
| Apromat, S.A. — Arad | Romania | 50% | |||||||
| Astra Vagoane, S.A. — Arad | Romania | 96% | |||||||
| ICPV, S.A. — Arad | Romania | 89% | |||||||
| International Industrial Indemnity Co. | 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 Company, 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 Industries de Mexico, 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 Rail do Brasil, Ltda. | Brazil | 100% | |||||||
| Trinity Industries Leasing Company | Delaware | 100% | |||||||
| Transport Capital, LLC | Delaware | 100% | |||||||
| Trinity Financial Services, Inc. | Delaware | 100% | |||||||
| Trinity Marks Company | Texas | 100% | |||||||
| TILX GP II, LLC | Delaware | 100% | |||||||
| Trinity Rail Leasing II, L.P. | Delaware | 1% | |||||||
| TILX LP II, LLC | Delaware | 100% | |||||||
| Trinity Rail Leasing II, L.P. | Delaware | 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 | Texas | 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% | |||||||
| TILC Equity OP LP III-C, LLC | Delaware | 100% | |||||||
| TILC Equity OP III-C, L.P. | Texas | 99% | |||||||
| Trinity Marine Leasing, Inc. | Delaware | 100% | |||||||
| Trinity Industries Real Properties, Inc. | Delaware | 100% | |||||||
| Trinity Industries Transportation, Inc. | Texas | 100% | |||||||
| Trinity Industries Transportation Services, LLC | Delaware | 100% | |||||||
| Trinity Marine Products, Inc. | Delaware | 100% | |||||||
| Trinity Materials, Inc. | Delaware | 100% | |||||||
| Trinity Mining Services, Inc. | Delaware | 100% | |||||||
| Percentage of | ||||||||||
| voting securities | ||||||||||
| owned by the | ||||||||||
| Name of subsidiary | Organized in | Registrant | ||||||||
| Trinity Rail Group, LLC | Delaware | 100% | ||||||||
| Thrall Vagonka Studenka, a.s | Czech Republic | 95% | ||||||||
| Thrall International Holdings LLC | Illinois | 99% | ||||||||
| Thrall Europa | Eng. & Wales | 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 Rail Components & Repair, Inc. | Delaware | 100% | ||||||||
| McConway and Torley Corporation | Pennsylvania | 100% | ||||||||
| MCT Properties, Inc. | Delaware | 100% | ||||||||
| McConway and 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 Rail Market Services, Inc. | Delaware | 100% | ||||||||
| Trinity Structural Towers, Inc. | Delaware | 100% | ||||||||
| TRN Investment Company, Inc. | Delaware | 100% | ||||||||
| TRN, Inc. | Delaware | 100% | ||||||||