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Exhibit 21
LIST OF SUBSIDIARIES OF THE REGISTRANT
As of December 31, 2023
Entity NameJurisdiction of Formation
LyondellBasell Industries N.V.Netherlands
LYB International Finance B.V.Netherlands
LyondellBasell Finance CompanyUnited States
Basell North America Inc.United States
Lyondell Chemical CompanyUnited States
LYB (Barbados) Holdings SRLBarbados
LYB Bayport Ethers LLCUnited States
LYB Channelview POTBA LLCUnited States
LYB (Barbados) SRLBarbados
LYB Equistar Holdings LLCUnited States
Equistar LP, LLCUnited States
Equistar GP, LLCUnited States
Equistar Chemicals, LPUnited States
Equistar Bayport, LLCUnited States
Equistar Mont Belvieu CorporationUnited States
LyondellBasell LC Offtake LLCUnited States
LYB Finance Holdings LLCUnited States
LYB Americas Finance Company LLCUnited States
Lyondell Chemical Properties, L.P.United States
LYB Houston Hub Holdings LLCUnited States
LYB International Finance III, LLCUnited States
LYB Receivables LLCUnited States
LYB Recycling CA LLCUnited States
Lyondell Chemical Europe, Inc.United States
Lyondell Chemical Overseas Services, Inc.United States
Lyondell Chemical Technology 1 Inc.United States
Lyondell Chemical Technology, L.P.United States
Lyondell POTechLP, Inc.United States
Lyondell Chemical Technology Management, Inc.United States
Lyondell POTechGP, Inc.United States
Lyondell POJVGP, LLCUnited States
Lyondell POJVLP, LLCUnited States
PO Offtake, LPUnited States
Lyondell Refining Company LLCUnited States
Lyondell Refining I LLCUnited States
Houston Refining LPUnited States
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Entity NameJurisdiction of Formation
LyondellBasell Acetyls Holdco, LLCUnited States
LyondellBasell Acetyls, LLCUnited States
LyondellBasell Investment LLCUnited States
LyondellBasell Transportation Company, LLCUnited States
LyondellBasell Advanced Polymers Inc.United States
A. Schulman International Inc.United States
AS Mex Hold S.A. de C.V.Mexico
A. Schulman de Mexico S.A. de C.V.Mexico
LyondellBasell SCS UK LtdUnited Kingdom
AS Worldwide LLC & Cie, S.C.S.Luxembourg
AS Worldwide, LLCUnited States
LYB Treasury Services Ltd.United Kingdom
ASI Investments Holding Co.United States
HGGC Citadel Plastics Holdings, Inc.United States
Bulk Molding Compounds, Inc.United States
BMC Deutschland GmbHGermany
tetra-DUR Kunststoff-Produktion GmbHGermany
BMC TetraDURTurkey Plastik Hammadde Kompozit Üretim Sanayi ve Ticaret Limted ŞirketiTurkey
HPC Holdings, LLCUnited States
LYB Composites Holding LLCUnited States
LyondellBasell Composites LLCUnited States
Quantum Composites, Inc.United States
LYB Matrixx Holdings Inc.United States
LYB Brazil Holdings LLCUnited States
A. Schulman Plásticos do Brasil Ltda.Brazil
LyondellBasell Hungary KftHungary
LYB International Funding B.V.Netherlands
LYB International LimitedCayman
LyondellBasell Subholdings B.V.Netherlands
Basell International Holdings B.V.Netherlands
Basell (Thailand) Holdings B.V.Netherlands
Basell Advanced Polyolefins (Thailand) Company Ltd.Thailand
Basell Advanced Polyolefins (Dalian) Co., Ltd.China
Basell Arabie Investissements SASFrance
Basell Asia Pacific LimitedChina
Basell Trading (Shanghai) Co. Ltd.China
LyondellBasell Malaysia Sdn. Bhd.Malaysia
LyondellBasell Polyolefin (Shanghai) Co., Ltd.China
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Entity NameJurisdiction of Formation
Basell Holdings Middle East GmbHGermany
Basell International Trading FZEUnited Arab Emirates
Basell Moyen Orient Investissements SASFrance
Basell Poliolefinas Ltda.Brazil
Colortech Da Amazonia Lta.Brazil
Basell Poliolefinas, S. de R.L. de C.V.Mexico
Basell Polyolefin Istanbul Ticaret Limited SirketiTurkey
Basell Polyolefins India Private LimitedIndia
Basell Polyolefins Korea Ltd.Korea, Republic Of
Bulk Molding Compounds do Brasil Industria de Plásticos Reforçados Ltda.Brazil
Citadel Plastics Mexico Holdings, LLCUnited States
Bulk Molding Compounds Mexico, S. de R.L. de C.V.Mexico
Lyondell Asia Holdings LimitedChina
Lyondell Basell Arabian LimitedSaudi Arabia
Lyondell China Holdings LimitedChina
Lyondell Greater China Holdings LimitedChina
Lyondell Greater China Trading LimitedChina
Lyondell Japan, Inc.Japan
Lyondell South Asia Pte LtdSingapore
LyondellBasell Advanced Polymers (Malaysia) Sdn. Bhd.Malaysia
LyondellBasell Advanced Polyolefins (Malaysia) Sdn. Bhd.Malaysia
LyondellBasell Brasil Ltda.Brazil
LyondellBasell Canada Inc.Canada
LyondellBasell Egypt LLCEgypt
LyondellBasell Polymers (Malaysia) Sdn. Bhd.Malaysia
LyondellBasell Singapore Pte. Ltd.Singapore
LyondellBasell Taiwan Co., Ltd.Taiwan
LyondellBasell Vietnam Company LimitedVietnam
OE Insurance LtdBermuda
LYB International Finance II B.V.Netherlands
LyondellBasell Industries Holdings B.V.Netherlands
A. Schulman Castellon S.L.Spain
A. Schulman International Services BVBelgium
A.Schulman Poznan Sp. Z o.o.Poland
A. Schulman Plastics BVBelgium
A. Schulman Belgium BVBelgium
A. Schulman Europe International B.V.Netherlands
A. Schulman 's-Gravendeel B.V.Netherlands
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Entity NameJurisdiction of Formation
A. Schulman Gainsborough LtdUnited Kingdom
A. Schulman Thermoplastic Compounds LimitedUnited Kingdom
A. Schulman Nordic ABSweden
A. Schulman Plastics S.r.l.Italy
A. Schulman Plastіk Sanayi ve Ticaret Anonim SirketiTurkey
A. Schulman Polska Sp. z o.o.Poland
Basell Benelux B.V.Netherlands
Basell Poliolefinas Iberica S.L.Spain
Basell Poliolefine Italia S.r.l.Italy
Basell Sales & Marketing Company B.V.Netherlands
Basell UK Holdings LimitedUnited Kingdom
Basell Polyolefins UK LimitedUnited Kingdom
LYB Finance Company B.V.Netherlands
LYB Luxembourg S.à r.l.Luxembourg
Basell Germany Holdings GmbHGermany
Basell Chemie Köln GmbHGermany
Basell Polyolefine GmbHGermany
Basell Bayreuth Chemie GmbHGermany
A. Schulman GmbHGermany
A. Schulman Real Estate GmbH & Co. KGGermany
LYB Europe Funding LimitedHong Kong
LyondellBasell Holdings France SASFrance
A. Schulman Europe Verwaltungs GmbHGermany
A. Schulman Inc. LimitedUnited Kingdom
A. Schulman Plastics SASFrance
A. Schulman S.A.S.France
Elian S.A.S.France
Basell Polyolefines France S.A.S.France
Compagnie de Distribution des Hydrocarbures SASFrance
Compagnie Petrochimique de Berre SASFrance
Lyondell Chimie France SASFrance
LyondellBasell Services France S.A.S.France
LYB Advanced Polymer Solutions Ireland LimitedIreland
LYB Ireland LimitedIreland
LyondellBasell Central Europe Kft.Hungary
LYB Trading Company B.V.Netherlands
Lyondell Chemie Nederland B.V.Netherlands
Lyondell Chemie (PO-11) B.V.Netherlands
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Entity NameJurisdiction of Formation
Lyondell Chemie (POSM) B.V.Netherlands
Lyondell PO-11 C.V.Netherlands
LyondellBasell China Holdings B.V.Netherlands
Basell Advanced Polyolefins (Suzhou) Co. Ltd.China
Guangzhou Basell Advanced Polyolefins Co., Ltd.China
LyondellBasell Advanced Polymer (Changshu) Co., Ltd.China
LyondellBasell Advanced Polymer (Dongguan) Co. Ltd.China
Mepol S.r.l.Italy
Industrial Technology Investments Poland Sp. Z.o.o.Poland
Polar S.r.l.Italy
LyondellBasell Circular Economy B.V.Netherlands
QCP Holding B.V.Netherlands
QCP Arles S.A.S.France
QCP IP B.V.Netherlands
QCP Landemont S.A.S.France
QCP B.V.Netherlands
Tivaco S.A.Belgium
* Where a subsidiary is owned by two or more entities, it is only listed once.



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Joint Ventures
Entity NameJurisdiction of Formation
Bora LyondellBasell Petrochemical Co., Ltd.1
China
Genox LyondellBasell New Material Co., Ltd.2
China
Ningbo ZRCC Lyondell Chemical Co. Ltd.3
China
Ningbo ZRCC LyondellBasell New Material Company Limited4
China
APK AG5
Germany
EPS Ethylen-Pipeline-Süd GmbH & Co. KG6
Germany
LMF Nord GmbH7
Germany
Source One Plastics GmbH8
Germany
PT LyondellBasell Advanced Polyolefins9
Indonesia
PT LyondellBasell Advanced Polyolefins Commercial10
Indonesia
PolyMirae Co., Ltd.11
Korea, Republic Of
Indelpro, S.A. de C.V.12
Mexico
Circular Rotterdam B.V.13
Netherlands
LyondellBasell Covestro Manufacturing Maasvlakte V.O.F.14
Netherlands
Rodepa Vastgoed B.V.15
Netherlands
Stiphout Industries B.V.16
Netherlands
Basell Orlen Polyolefins Sp. Z.o.o.17
Poland
Al Waha Petrochemical Company18
Saudi Arabia
Natpet Schulman Specialty Plastic Compounds19
Saudi Arabia
Saudi Ethylene & Polyethylene Company20
Saudi Arabia
Saudi Polyolefins Company21
Saudi Arabia
HMC Polymers Company Limited22
Thailand
SCG ICO Polymers Company Limited23
Thailand
Cyclyx International LLC24
United States
Louisiana Integrated PolyEthylene JV LLC25
United States
PD Glycol LP26
United States
PO JV, LP27
United States
Technology JV, LP28
United States
1 Basell International Holdings B.V. owns a 50% interest in Bora LyondellBasell Petrochemical Co., Ltd.
2 Basell International Holdings B.V. owns a 50% interest in Genox LyondellBasell New Material Co., Ltd.
3 Lyondell China Holdings Limited owns a 26.65% interest in Ningbo ZRCC Lyondell Chemical Co. Ltd.
4 Lyondell China Holdings Limited owns a 50% interest in Ningbo ZRCC LyondellBasell New Material Company Limited.
5 LyondellBasell Industries Holdings B.V. owns a 10.88% interest in APK AG.
6 Basell Polyolefine GmbH owns a 14.07% interest in EPS Ethylen-Pipeline-Süd GmbH & Co. KG.
7 LyondellBasell Industries Holdings B.V. owns a 50% interest in LMF Nord GmbH.
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8 LyondellBasell Industries Holdings B.V. owns a 49% interest in Source One Plastics GmbH.
9 A. Schulman International Inc. owns a 65% interest in PT LyondellBasell Advanced Polyolefins.
10 A. Schulman International Inc. owns a 65% interest in PT LyondellBasell Advanced Polyolefins Commercial.
11 Basell International Holdings B.V. owns a 50% interest in PolyMirae Co., Ltd.
12 Basell International Holdings B.V. owns a 49% interest in Indelpro, S.A. de C.V.
13 LyondellBasell Industries Holdings B.V. owns a 22.65% interest in Circular Rotterdam B.V.
14 Lyondell PO-11 C.V. owns a 50% interest in LyondellBasell Covestro Manufacturing Maasvlakte V.O.F.
15 LyondellBasell Industries Holdings B.V. owns 50% interest in Rodepa Vastgoed B.V.
16 LyondellBasell Industries Holdings B.V. owns 50% interest in Stiphout Industries B.V.
17 LyondellBasell Industries Holdings B.V. owns a 50% interest in Basell Orlen Polyolefins Sp. Z.o.o.
18 Basell Arabie Investissements SAS owns a 25% interest in Al Waha Petrochemical Company.
19 A. Schulman Europe International B.V. owns a 50% interest in Natpet Schulman Specialty Plastic Compounds.
20 Basell Moyen Orient Investissments SAS owns a 25% interest in Saudi Ethylene & Polyethylene Company.
21 Basell Holdings Middle East GmbH owns a 25% interest in Saudi Polyolefins Company.
22 Basell (Thailand) Holdings B.V. owns a 28.56% interest in HMC Polymers Company Limited.
23 LyondellBasell Advanced Polyolefins (Malaysia) Sdn. Bhd. owns a 13% interest in SCG ICO Polymers Company Limited.
24 Equistar Chemicals, LP owns a 25% interest in Cyclyx International LLC.
25 LyondellBasell LC Offtake LLC owns a 50% interest in Louisiana Integrated PolyEthylene JV LLC.
26 Equistar Chemicals, LP owns a 50% interest in PD Glycol LP.
27 PO Offtake, LP owns a 50% interest in PO JV, LP.
28 Lyondell POTechLP, Inc. owns a 49% partnership interest in Technology JV, LP. Lyondell POTechGP, Inc. owns a 1% partnership interest in Technology JV, LP.
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