Exhibit 21
| Entity Name | Jurisdiction of Formation | |
| Basell (Thailand) Holdings B.V. |
Netherlands | |
| Basell Advanced Polyolefins (Suzhou) Co. Ltd. |
China | |
| Basell Advanced Polyolefins (Thailand) Company Ltd. |
Thailand | |
| Basell Arabie Investissements SAS |
France | |
| Basell Asia Pacific Consulting (Shanghai) Co., Ltd. |
China | |
| Basell Asia Pacific Limited |
Hong Kong | |
| Basell Bayreuth Chemie GmbH |
Germany | |
| Basell Benelux B.V. |
Netherlands | |
| Basell Canada Inc. |
Ontario | |
| Basell Cayman Corporation |
Cayman | |
| Basell Chemie Köln GmbH |
Germany | |
| Basell Deutschland GmbH |
Germany | |
| Basell Europe Holdings B.V. |
Netherlands | |
| Basell France S.A.S. |
France | |
| Basell Germany Holdings GmbH |
Germany | |
| Basell Holdings Middle East GmbH |
Germany | |
| Basell Ibérica Poliolefinas Holdings S.L. |
Spain | |
| Basell International Holdings B.V. |
Netherlands | |
| Basell International Trading FZE |
United Arab Emirates | |
| Basell Italia S.r.l |
Italy | |
| Basell Mexico, S. de R.L. de C.V. |
Mexico | |
| Basell Moyen Orient Investissements SAS |
France | |
| Basell North America Inc. |
Delaware | |
| Basell Poliolefinas Comercial Espagnola S.L. |
Spain | |
| Basell Poliolefinas Iberica S.L. |
Spain | |
| Basell Poliolefinas Ltda. |
Brazil | |
| Basell Poliolefinas, S. de R.L. de C.V. |
Mexico | |
| Basell Poliolefine Italia S.r.l. |
Italy | |
| Basell Polyéthylène S.A.S. |
France | |
| Basell Polyolefin Istanbul Ticaret Limited Sirketi |
Turkey | |
| Basell Polyolefine GmbH |
Germany | |
| Basell Polyolefines France S.A.S. |
France | |
| Basell Polyolefins Company BVBA |
Belgium | |
| Basell Polyolefins India Private Limited |
India | |
| Basell Polyolefins Korea Ltd. |
Korea | |
| Basell Polyolefins UK Limited |
United Kingdom | |
| Basell Sales & Marketing Company B.V. |
Netherlands | |
| Basell Service Company B.V. |
Netherlands | |
| Basell Slovakia s.r.o. |
Slovakia | |
| Basell UK Holdings Ltd. |
United Kingdom | |
| Basell UK Limited |
United Kingdom | |
| Compagnie de Distribution des Hydrocarbures SAS |
France | |
| Compagnie Petrochimique de Berre SAS |
France | |
| Complejo Industrial Taqsa A.I.E. |
Spain | |
| Equistar Bayport, LLC |
Delaware | |
| Equistar Chemicals, LP |
Delaware | |
| Equistar GP, LLC |
Delaware | |
| Equistar LP, LLC |
Delaware |
| Equistar Mont Belvieu Corporation |
Delaware | |
| Equistar Olefins G.P., LLC |
Delaware | |
| Equistar Olefins Offtake G.P., LLC |
Delaware | |
| Equistar Olefins Offtake LP |
Delaware | |
| GuangZhou Basell Advanced Polyolefins Co., Ltd. |
China | |
| Hisane A.I.E. |
Spain | |
| Houston Refining LP |
Delaware | |
| Industriepark Münchsmünster GmbH & Co. KG |
Germany | |
| Industriepark Münchsmünster Verwaltungsgesellschaft mbH |
Germany | |
| LaPorte Methanol Company, L.P. |
Delaware | |
| LYB Americas Finance Company |
Delaware | |
| LYB Americas Finance Holdings B.V. |
Netherlands | |
| LYB Bermuda Ltd. |
Bermuda | |
| LYB Finance Company B.V. |
Netherlands | |
| LYB Financial Services LP |
Delaware | |
| LYB International Finance B.V. |
Netherlands | |
| LYB Ireland Limited |
Ireland | |
| LYB Luxembourg S.à r.l. |
Luxembourg | |
| LYB Luxembourg II S.à r.l. |
Luxembourg | |
| LYB Receivables LLC |
Delaware | |
| LYB Trading Company B.V. |
Netherlands | |
| Lyondell Asia Holdings Limited |
Hong Kong | |
| Lyondell Asia Pacific, Ltd. |
Delaware | |
| Lyondell Centennial Corp. |
Delaware | |
| Lyondell Chemical Central Europe Ges.m.b.H. |
Austria | |
| Lyondell Chemical Company |
Delaware | |
| Lyondell Chemical Espana Co. |
Delaware | |
| Lyondell Chemical Europe, Inc. |
Delaware | |
| Lyondell Chemical International Company |
Delaware | |
| Lyondell Chemical Overseas Services, Inc. |
Delaware | |
| Lyondell Chemical Pan America, Inc. |
Delaware | |
| Lyondell Chemical Products Europe LLC |
Delaware | |
| Lyondell Chemical Properties, L.P. |
Delaware | |
| Lyondell Chemical Technology 1 Inc. |
Delaware | |
| Lyondell Chemical Technology Management, Inc. |
Delaware | |
| Lyondell Chemical Technology, L.P. |
Delaware | |
| Lyondell Chemie (PO-11) B.V. |
Netherlands | |
| Lyondell Chemie (POSM) B.V. |
Netherlands | |
| Lyondell Chemie Nederland B.V. |
Netherlands | |
| Lyondell Chimie France LLC |
Delaware | |
| Lyondell Chimie France SAS |
France | |
| Lyondell China Holdings Limited |
Hong Kong | |
| Lyondell Europe Holdings Inc. |
Delaware | |
| Lyondell France Holdings SAS |
France | |
| Lyondell Greater China Holdings Limited |
Hong Kong | |
| Lyondell Greater China Trading Limited |
China | |
| Lyondell Greater China, Ltd. |
Delaware | |
| Lyondell Japan, Inc. |
Japan | |
| Lyondell PO-11 C.V. |
Netherlands | |
| Lyondell POJVGP, LLC |
Delaware |
| Lyondell POJVLP, LLC |
Delaware | |
| Lyondell POTechGP, Inc. |
Delaware | |
| Lyondell POTechLP, Inc. |
Delaware | |
| Lyondell Quimica do Brasil, Ltda |
Brazil | |
| Lyondell Refining Company LLC |
Delaware | |
| Lyondell Refining I LLC |
Delaware | |
| Lyondell South Asia Pte Ltd |
Singapore | |
| LyondellBasell Acetyls Holdco, LLC |
Delaware | |
| LyondellBasell Acetyls, LLC |
Delaware | |
| LyondellBasell Advanced Polyolefins Mexico, S.A. de C.V. |
Mexico | |
| LyondellBasell Australia (Holdings) Pty Ltd |
Australia | |
| LyondellBasell Australia Pty Ltd |
Australia | |
| LyondellBasell China Holdings B.V. |
Netherlands | |
| LyondellBasell Disaster Relief Fund |
Delaware | |
| LyondellBasell F&F Holdco, LLC |
Delaware | |
| LyondellBasell Finance Company |
Delaware | |
| LyondellBasell Industries Holdings B.V. |
Netherlands | |
| LyondellBasell Methanol GP, Inc. |
Delaware | |
| LyondellBasell Methanol LP, Inc. |
Delaware | |
| LyondellBasell Polyolefins |
Russia | |
| LyondellBasell Proche Orient Investissements SAS |
France | |
| LyondellBasell Services France S.A.S. |
France | |
| LyondellBasell Subholdings B.V. |
Netherlands | |
| LyondellBasell Syrma SAS |
France | |
| OE Insurance Ltd |
Bermuda | |
| Olefins JV, LP |
Delaware | |
| Petroken Petroquimica Ensenada SA |
Argentina | |
| PO JV, LP |
Delaware | |
| PO Offtake, LP |
Delaware | |
| POSM II Limited Partnership, L.P. |
Delaware | |
| POSM II Properties Partnership LLC |
Delaware | |
| SCI de Plastiques de Normandie |
France | |
| Société du Noir d’Acétylene de l’Aubette SAS |
France | |
| Technology JV, LP |
Delaware | |
| TRV Thermische Rückstandsverwertung GmbH & Co. KG |
Germany | |
| TRV Thermische Rückstandsverwertung Verwaltungs-GmbH |
Germany |