Exhibit 21
LIST OF SUBSIDIARIES OF THE REGISTRANT
As of December 31, 2018
| Entity Name | Jurisdiction of Formation |
| A. Schulman AG | Switzerland |
| A. Schulman Asia Limited | Hong Kong |
| A. Schulman Australia Pty Ltd | Australia |
| A. Schulman Belgium BVBA | Belgium |
| A. Schulman Canada Ltd. | Ontario |
| A. Schulman Castellon S.L. | Spain |
| A. Schulman de Mexico S.A. de C.V. | Mexico |
| A. Schulman del Peru S.A.C. | Peru |
| A. Schulman Europe GmbH & Co. KG | Germany |
| A. Schulman Europe International B.V. | Netherlands |
| A. Schulman Europe Verwaltungs GmbH | Germany |
| A. Schulman Gainsborough Ltd | United Kingdom |
| A. Schulman GmbH | Germany |
| A. Schulman Holding Company France S.A.S. | France |
| A. Schulman Holdings (France) S.A.S. | France |
| A. Schulman Holdings S.à.r.l. | Luxembourg |
| A. Schulman Inc. Limited | United Kingdom |
| A. Schulman International Inc. | Delaware |
| A. Schulman International Services BVBA | Belgium |
| A. Schulman Ireland Limited | Ireland |
| A. Schulman Magyarország Kereskedelmi Korlátolt Felelősségű Társaság | Hungary |
| A. Schulman Nordic AB | Sweden |
| A. Schulman Plásticos do Brasil Ltda. | Brazil |
| A. Schulman Plastics (Branch) | United Arab Emirates |
| A. Schulman Plastics (Dongguan) Ltd. | China |
| A. Schulman Plastics (Malaysia) Sdn. Bhd. | Malaysia |
| A. Schulman Plastics (Suzhou) Co., Ltd. | China |
| A. Schulman Plastics BVBA | Belgium |
| A. Schulman Plastics bvba Bornem Sucursala Cluj-Napoca | Romania |
| A. Schulman Plastics India Private Limited | India |
| A. Schulman Plastics PTY. LTD. | Australia |
| A. Schulman Plastics S.r.l. | Italy |
| A. Schulman Plastics SAS | France |
| A. Schulman Plastіk Sanayi ve Ticaret Anonim Sirketi | Istanbul |
| A. Schulman Polska Sp. z o.o. | Warsaw |
| A. Schulman Real Estate GmbH & Co. KG | Germany |
| A. Schulman S.à.r.l. | Luxembourg |
| A. Schulman S.A.S. | France |
| A. Schulman 's-Gravendeel B.V. | Netherlands |
| A. Schulman Thermoplastic Compounds Limited | United Kingdom |
| A. Schulman Thermoplastic Compounds Sdn Bhd | Malaysia |
| A. Schulman, Inc. | Delaware |
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| Entity Name | Jurisdiction of Formation |
| A.Schulman Plastics, odštěpný závod | Czech Republic |
| A.Schulman Poznan Sp. Z o.o. | Poland |
| Al Waha Petrochemical Company | Saudi Arabia |
| AS Global Holdings, Inc. | Delaware |
| AS Mex Hold S.A. de C.V. | Mexico |
| AS Worldwide LLC & Cie, S.C.S. | Luxembourg |
| AS Worldwide, LLC | Delaware |
| ASI Akron Land Co. | Delaware |
| ASI Employment S.A. de C.V. | Mexico |
| ASI Investments Holding Co. | Delaware |
| Basell (Thailand) Holdings B.V. | Netherlands |
| Basell Advanced Polyolefins (Dalian) Co. Ltd. | China |
| Basell Advanced Polyolefins (Suzhou) Co. Ltd. | China |
| Basell Advanced Polyolefins (Thailand) Company Ltd. | Thailand |
| Basell Arabie Investissements SAS | France |
| Basell Asia Pacific Limited | Hong Kong |
| Basell Bayreuth Chemie GmbH | Germany |
| Basell Benelux B.V. | Netherlands |
| Basell Canada Inc. | Ontario |
| 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 Orlen Polyolefins Sp. Z.o.o. | Poland |
| Basell Orlen Polyolefins Sprzedaz Sp. Z.o.o. | Poland |
| 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 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 |
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| Entity Name | Jurisdiction of Formation |
| 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 Trading (Shanghai) Co. Ltd. | Shanghai |
| Basell UK Holdings Limited | United Kingdom |
| Basell UK Ltd. | United Kingdom |
| BKV Beteiligungs- und Kunststoffverwertungs-gesellschaft mbH | Germany |
| BMC Deutschland GmbH | Germany |
| BMC Dongguan Limited | China |
| BMC Far East Limited | Hong Kong |
| BMC TetraDURTurkey Plastik Hammadde Kompozit Üretim Sanayi ve Ticaret Limted Şirketi | Turkey |
| Brindisi Servizi Generali S.c.a.r.l. | Italy |
| Bulk Molding Compounds do Brasil Industria de Plásticos Reforçados Ltda. | Brazil |
| Bulk Molding Compounds Mexico, S. de R.L. de C.V. | Mexico |
| Bulk Molding Compounds, Inc. | Illinois |
| Citadel Brazil Holdings LLC | Delaware |
| Citadel Intermediate Holdings, LLC | Delaware |
| Citadel Plastics Holdings Coöperatief U.A. | Amsterdam |
| Citadel Plastics Holdings, Inc. | Delaware |
| Citadel Plastics Mexico Holdings, LLC | Delaware |
| Citadel Plastics Netherlands Holdings, LLC | Delaware |
| Compagnie de Distribution des Hydrocarbures SAS | France |
| Compagnie Petrochimique de Berre SAS | France |
| Elian S.A.S. | France |
| EMS Holding Ltd. | Ohio |
| EPS Ethylen-Pipeline-Süd Geschäftsführungs GmbH | Germany |
| EPS Ethylen-Pipeline-Süd GmbH & Co. KG | Germany |
| Equistar Bayport, LLC | Delaware |
| Equistar Chemicals, LP | Delaware |
| Equistar GP, LLC | Delaware |
| Equistar LP, LLC | Delaware |
| Equistar Mont Belvieu Corporation | Delaware |
| GuangZhou Basell Advanced Polyolefins Co., Ltd. | China |
| Hadlock Plastics, LLC | Delaware |
| HGGC Citadel Plastics Holdings, Inc. | Delaware |
| HGGC Citadel Plastics Intermediate Holdings, Inc. | Delaware |
| HMC Polymers Company Limited | Thailand |
| Houston Refining LP | Delaware |
| HPC Holdings, LLC | Delaware |
| I.F.M. S.c.a.r.l. | Italy |
| ICO Europe C.V. | Netherlands |
| ICO Holdings New Zealand Limited | New Zealand |
| ICO Holdings, LLC | Texas |
| ICO Petrochemical Cayman Islands | Cayman |
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| Entity Name | Jurisdiction of Formation |
| ICO Polymers Cayman Islands | Cayman |
| Indelpro, S.A. de C.V. | Mexico |
| Infraserv GmbH & Co Knapsack KG | Germany |
| Infraserv GmbH & Co. Höchst KG | Germany |
| Inmobiliaria Satchmo, S. de R.L. de C.V. | Mexico |
| Innovación Y Desarrollo en Materiales Avanzados, A.C. | Mexico |
| J.R. Courtenay (N.Z.) Limited | New Zealand |
| La Porte Methanol Company, L.P. | Delaware |
| Limited Liability Company "LyondellBasell Polyolefins" | Togliatti, Samara region |
| Limited Liability Company A. Schulman | Russia |
| LPI Holding Company | Delaware |
| Lucent Polymers Inc. | Delaware |
| LYB (Barbados) SRL | Barbados |
| LYB Advanced Polymer Solutions Ireland Limited | Ireland |
| LYB Americas Finance Company LLC | Delaware |
| LYB Americas Finance Holdings B.V. | Netherlands |
| LYB Bermuda Ltd. | Bermuda |
| LYB DISC Inc. | Delaware |
| LYB Equistar Holdings LLC | Delaware |
| LYB Export Holdings Limited | England |
| LYB Exports Inc. | Delaware |
| LYB Finance Company B.V. | Netherlands |
| LYB International Finance B.V. | Netherlands |
| LYB International Finance II B.V. | Netherlands |
| LYB International Finance III, LLC | Delaware |
| LYB Ireland 2 Limited | Ireland |
| LYB Ireland Limited | Ireland |
| LYB Luxembourg III S.à r.l. | Luxembourg |
| LYB Luxembourg S.à r.l. | Luxembourg |
| LYB Receivables LLC | Delaware |
| LYB Trading Company B.V. | Netherlands |
| LYB Treasury Services Ltd. | United Kingdom |
| Lyondell Asia Holdings Limited | Hong Kong |
| Lyondell Centennial Corp. | Delaware |
| Lyondell Chemical Company | Delaware |
| Lyondell Chemical Europe, Inc. | Delaware |
| Lyondell Chemical Overseas Services, 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 |
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| Entity Name | Jurisdiction of Formation |
| Lyondell Chimie France SAS | France |
| Lyondell China Holdings Limited | Hong Kong |
| 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 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 Brasil Ltda. | Brazil |
| LyondellBasell China Holdings B.V. | Netherlands |
| LyondellBasell Covestro Manufacturing Maasvlakte V.O.F. | Netherlands |
| LyondellBasell Disaster Relief Fund | Delaware |
| LyondellBasell F&F Holdco, LLC | Delaware |
| LyondellBasell Finance Company | Delaware |
| LyondellBasell Holdings France SAS | France |
| LyondellBasell Industries Holdings B.V. | Netherlands |
| LyondellBasell Industries N.V. | Netherlands |
| LyondellBasell Investment LLC | Delaware |
| LyondellBasell Malaysia Sdn. Bhd. | Malaysia |
| LyondellBasell Methanol GP, Inc. | Delaware |
| LyondellBasell Methanol LP, Inc. | Delaware |
| LyondellBasell Polyolefin (Shanghai) Co., Ltd. | China |
| LyondellBasell Services France S.A.S. | France |
| LyondellBasell Subholdings B.V. | Netherlands |
| LyondellBasell Syrma SAS | France |
| LyondellBasell Taiwan Co., Ltd. | Taiwan |
| LyondellBasell Transportation Company, LLC | Delaware |
| Natpet Schulman Specialty Plastic Compounds | Saudi Arabia |
| Ningbo ZRCC Lyondell Chemical Co. Ltd. | China |
| Ningbo ZRCC Lyondell Chemical Marketing Co. Ltd. | China |
| NOC Asia Limited | Hong Kong |
| OE Insurance Ltd | Bermuda |
| Oil Casualty Insurance, Ltd. | Bermuda |
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| Entity Name | Jurisdiction of Formation |
| Oil Insurance Limited | Bermuda |
| PD Glycol LP | Texas |
| PO JV, LP | Delaware |
| PO Offtake, LP | Delaware |
| Poly Pacific Polymers Sdn. Bhd. | Malaysia |
| Poly Pacific Pty. Ltd. | Australia |
| PolyMirae Co., Ltd. | Korea |
| POSM II Limited Partnership, L.P. | Delaware |
| POSM II Properties Partnership LLC | Delaware |
| Premix Holding Company | Delaware |
| Premix, Inc. | Ohio |
| Prime Colorants, Inc. | Tennessee |
| PT ASchulman Plastics Commercial | Indonesia |
| PTA. Schulman Plastics | Indonesia |
| PTT Chemical PCL | Thailand |
| QCP B.V. | Netherlands |
| QCP Holding B.V. | Netherlands |
| QCP IP B.V. | Netherlands |
| Quantum Composites, Inc. | Ohio |
| Rayong Olefins Co., Ltd. | Thailand |
| RIGK GmbH Gesellschaft zur Rückführung industrieller and gewerblicher Kunstoffverpackungen mbH | Germany |
| San Jacinto Rail Limited | Delaware |
| Saudi Ethylene & Polyethylene Company | Saudi Arabia |
| Saudi Polyolefins Company | Saudi Arabia |
| SCG ICO Polymers Company Limited | Thailand |
| Sociedad Espanola De Materiales Plasticos, Semap, S.A. | Spain |
| Société des Stockages Petroliers du Rhône SA | France |
| Stichting TopCo, in liquidation | Netherlands |
| Surplast S.A. | Argentina |
| Technology JV, LP | Delaware |
| tetra-DUR Kunststoff-Produktion GmbH | Germany |
| The Matrixx Group, Incorporated | Indiana |
| TRV Thermische Rückstandsverwertung GmbH & Co. KG | Germany |
| TRV Thermische Rückstandsverwertung Verwaltungs-GmbH | Germany |
| ULSAN PP Co., Ltd. | Korea |
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