EXHIBIT 21.1 SUBSIDIARIES OF THE REGISTRANT
% of Voting
Securities
Jurisdiction of Held at December
Incorporation or 31,
Name of Corporation Organization 2002 (1)
- ----------------------------------- ---------------- ----------
Amcorp, Inc. Delaware 100%
ASC Holdings, Inc. Utah 100
Amalgamated Research, Inc. Idaho 100
Andrews County Holdings, Inc. Delaware 100
Waste Control Specialists LLC Delaware 90
Greenhill Technologies LLC Delaware 50
Tecsafe LLC Delaware 50
NL Industries, Inc. (2),(3) New Jersey 63
Tremont Group, Inc. (3) Delaware 80
Tremont Corporation Delaware 80
TRECO L.L.C. Nevada 100
Basic Management, Inc. Nevada 32
The Landwell Company LP Delaware 50
The Landwell Company LP Delaware 12
TRE Holding Corporation Delaware 100
TRE Management Company Delaware 100
Tremont Colorado Corporation Delaware 100
Tall Pines Insurance Company Vermont 100
Titanium Metals Corporation (5) Delaware 39
NL Industries, Inc. New Jersey 21
Valcor, Inc. Delaware 100
Medite Corporation Delaware 100
CompX International Inc. (4) Delaware 66
Other wholly-owned
Valmont Insurance Company Vermont 100
Impex Realty Holding, Inc. Delaware 100
(1) Held by the Registrant or the indicated subsidiary of the Registrant.
(2) Subsidiaries of NL are incorporated by reference to Exhibit 21.1 of NL's
Annual Report on Form 10-K for the year ended December 31, 2002 (File No.
1-640).
(3) NL owns the other 20% of Tremont Group.
(4) Subsidiaries of CompX are incorporated by reference to Exhibit 21.1 of
CompX's Annual Report on Form 10-K for the year ended December 31, 2002
(File No. 1-13905). The Registrant owns an additional 3% of CompX directly.
(5) Subsidiaries of Titanium Metals Corporation are incorporated by reference
to Exhibit 21.1 of TIMET's Annual Report on Form 10-K for the year ended
December 31, 2002 (File No. 0-28538).