Exhibit 21.1
MILLENNIUM CHEMICALS INC.
STATE OR COUNTRY
OF INCORPORATION
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Millennium Chemicals Inc. Delaware/UK Resident
Millennium Overseas Holdings Limited United Kingdom
Millennium Chemicals UK Holdings Limited United Kingdom
Millennium Grimsby Ltd. United Kingdom
Millennium Inorganic Chemicals Limited United Kingdom
Millennium Inorganic Chemicals S.A. France
Societe Immobiliere de la Cote Societe Anonyme France
Thann Chimie SNC France
Millennium Holdings Brasil Ltda. Brazil
Millennium Inorganic Chemicals do Brasil S.A. (1) Brazil
Millennium Stallingborough Ltd. United Kingdom
Rutile Holdings Ltd. United Kingdom
SCMC Holdings B.V. Netherlands
Millennium Bunbury Ltd. Australia
Millennium Inorganic Chemicals Ltd. Australia
Millennium Performance Chemicals (Advanced
Ceramics) Pty. Ltd. Australia
Millennium America Holdings Inc. Delaware
Millennium America Inc. Delaware
Millennium Holdings Inc. Delaware
Millennium Specialty Chemicals Inc. Delaware
Millennium Petrochemicals Inc. Virginia
Millennium Petrochemicals GP LLC (2) Delaware
Millennium Petrochemicals LP LLC (2) Delaware
Millennium Methanol LP Inc. (3) Delaware
Millennium Methanol GP Inc. (3) Delaware
Millennium Inorganic Chemicals Inc. Delaware
HMB Holdings Inc. Delaware
MHC Inc. Delaware
LeMean Property Holdings Corporation Delaware
(1) Millennium Holdings Brasil Ltda. owns 99% of the voting shares and 72% of
the total shares of Millennium Inorganic Chemicals do Brasil S.A.
(2) Millennium Petrochemicals GP LLC and Millennium Petrochemicals LP LLC
together own a 29.5% interest in Equistar Chemicals, LP.
(3) Millennium Methanol LP Inc. and Millennium Methanol GP Inc. together own an
85% interest in La Porte Methanol Company, L.P.