EX-21 4 cbt-ex21.htm EX-21

Exhibit 21

Subsidiaries of Cabot Corporation (as of September 30, 2025)*

Subsidiary | State/Jurisdiction of Incorporation
Cabot Argentina S.A.I.C. | Argentina
Cabot Australia Holdings Pty. Ltd. | Australia
Cabot Plastics Belgium S.A. | Belgium
Cabot Performance Materials Belgium S.P.R.L. | Belgium
Cabot Brasil Industria e Comércio Ltda. | Brazil
Cabot Canada Ltd. | Ontario, Canada
8755329 Canada, Inc. | Quebec, Canada
Tech Blend Corporation | Quebec, Canada
Cabot Plastics Canada LP | Quebec, Canada
Shanghai Cabot Chemical Company Ltd. | China
Cabot (China) Limited | China
Cabot Advanced Battery Materials (Tianjin) Co., Ltd | China
Cabot Bluestar Chemical (Jiangxi) Co., Ltd. | China
Cabot Chemical (Tianjin) Co., Ltd. | China
Cabot Performance Materials (Shenzhen) Co., Ltd. | China
Cabot Performance Materials (Zhuhai) Co., Ltd. | China
Cabot Performance Products (Tianjin) Co., Ltd. | China
Cabot Risun Chemical (Xingtai) Co., Ltd. | China
Cabot HengYeCheng Performance Materials (Inner-Mongolia) Company Limited | China
Cabot Performance Materials (Xuzhou) Co., Ltd. (fka NSCC Carbon (Jiangsu) Co., Ltd.) | China
Cabot Colombiana S.A.S. | Colombia
CS Cabot spol, s.r.o. | Czech Republic
Cabot Czech Holding Company s.r.o. | Czech Republic
Cabot France S.A.S. | France
Cabot Carbone S.A.S. | France
Cabot GmbH | Germany
Cabot Holdings I GmbH | Germany
Cabot Holdings II GmbH | Germany
Cabot Aerogel GmbH | Germany
Cabot Battery Materials GmbH | Germany
Cabot India Private Limited | India
P.T. Cabot Indonesia | Indonesia

Exhibit 21

Subsidiary | State/Jurisdiction of Incorporation
PT Cabot Asia Pacific South | Indonesia
Cabot Italiana S.p.A. | Italy
Cabot Performance Materials Italy S.r.l | Italy
Aizu Holdings G.K. | Japan
Cabot Japan K.K. | Japan
Cabot Supermetals K.K. | Japan
Cabot Specialty Chemicals, Inc. G.K. | Japan
Cabot Korea Y.H. | Korea
SIA Cabot Latvia | Latvia
Cabot Luxembourg Holdings S.à.r.l. | Luxembourg
Cabot Luxembourg Investments S.à.r.l. | Luxembourg
Cabot Luxembourg TC S.à.r.l. | Luxembourg
Cabot NHUMO Holdings I S.à.r.l. | Luxembourg
Cabot Asia Sdn. Bhd. | Malaysia
Cabot Materials Research Sdn Bhd. | Malaysia
Cabot (Malaysia) Sdn. Bhd. | Malaysia
CMHC, Inc. | Mauritius
Cabot Singapore Pte. Ltd. | Singapore
Cabot Specialty Chemicals Mexico S.A.P.I. de C.V. | Mexico
Cabot S.A. | Spain
Cabot Battery Materials, S.A. | Spain
Cabot International GmbH | Switzerland
Cabot Switzerland GmbH | Switzerland
Cabot B.V. | The Netherlands
Cabot Finance B.V. | The Netherlands
Cabot Performance Materials Netherlands B.V. | The Netherlands
AHB Investments Limited | British Virgin Islands
HDF Investments Limited | British Virgin Islands
Ramaai Holdings Limited | British Virgin Islands
Cabot Performance Products FZE | Dubai, United Arab Emirates
Cabot Carbon Limited | United Kingdom (England)
Cabot G.B. Limited | United Kingdom (England)
Cabot Plastics Limited | United Kingdom (England)
Cabot U.K. Limited | United Kingdom (England)

Exhibit 21

Subsidiary | State/Jurisdiction of Incorporation
Cabot UK Holdings Limited | United Kingdom (England)
Cabot Performance Materials UK Limited | United Kingdom (England)
Cabot Activated Carbon Holdings UK Limited | United Kingdom (England)
Cabot Activated Carbon UK Limited | United Kingdom (England)
Applied NanoStructured Solutions, LLC | Delaware, United States
Beyond Lotus LLC | Delaware, United States
Cabot Asia Investments Corporation | Delaware, United States
Cabot Ceramics, Inc. | Delaware, United States
Cabot Corporation Foundation, Inc. | Massachusetts, United States
Cabot CSC LLC | Delaware, United States
Cabot Holdings LLC | Delaware, United States
Cabot Insurance Co. Ltd. (Vermont) | Vermont, United States
Cabot International Capital Corporation | Delaware, United States
Cabot Specialty Chemicals, Inc. | Delaware, United States
CDE Company | Delaware, United States
Energy Transport Limited LLC | Delaware, United States
Kawecki Chemicals, Inc. | Delaware, United States
Cabot Activated Carbon LLC | Delaware, United States
Northeast Boulevard, LLC | Florida, United States
Representaciones 1, 2 y 3 C.A. | Venezuela
Valores Ramaai C.A. | Venezuela