On the Record · Trinseo
Trinseo subsidiaries, as it lists them
The subsidiaries Trinseo lists in its latest annual report, with the jurisdiction of each, linked to the filing.
Subsidiaries it lists
| Subsidiary | Jurisdiction |
|---|---|
| Trinseo Belgium B.V. | Belgium |
| Trinseo Operating Belgium B.V. | Belgium |
| Trinseo Canada ULC | Canada |
| Styron Synthetic Materials (Shanghai) Company Limited | China |
| Trinseo Polymers (Zhangjiagang) Company Limited | China |
| Altuglas International Denmark A/S | Denmark |
| Trinseo Suomi Oy | Finland |
| Altuglas International SAS | France |
| Trinseo France S.A.S. | France |
| Trinseo Deutschland Anlagengesellschaft mbH | Germany |
| Trinseo Deutschland GmbH | Germany |
| Trinseo (Hong Kong) Limited | Hong Kong |
| Trinseo Materials (Hong Kong) Limited | Hong Kong |
| Trinseo India Trading Private Limited | India |
| PT Trinseo Materials Indonesia | Indonesia |
| PT Trinseo Operating Indonesia | Indonesia |
| Trinseo Finance Ireland Unlimited Company | Ireland |
| Trinseo Ireland Global IHB Limited | Ireland |
| Trinseo Ireland Holdings Limited | Ireland |
| Trinseo Services Ireland Limited | Ireland |
| A.P.I. Applicazioni Plastiche Industriali S.p.A. | Italy |
| Altuglas S.r.l. | Italy |
| Trinseo Italia S.R.L. | Italy |
| Trinseo Japan Y.K. | Japan |
| Trinseo Korea Ltd. | Korea |
| Trinseo Holding S.à r.l. | Luxembourg |
| Trinseo Luxco S.à r.l. | Luxembourg |
| Trinseo Luxco Finance SPV S.à r.l. | Luxembourg |
| Altuglas Mexico, S.A. de C.V. | Mexico |
| Trinseo de México S. de R.L. de C.V. | Mexico |
| Heathland B.V. | The Netherlands |
| Styron Netherlands Holding Company B.V. | The Netherlands |
| Trinseo Holding B.V. | The Netherlands |
| Trinseo Netherlands B.V. | The Netherlands |
| Trinseo Holdings Asia Pte. Ltd. | Singapore |
| Trinseo Singapore Pte. Ltd. | Singapore |
| Trinseo Sverige AB | Sweden |
| Trinseo Europe GmbH | Switzerland |
| Trinseo Export GmbH | Switzerland |
| Taiwan Trinseo Limited | Taiwan |
| Trinseo Kimya Ticaret Limited Şirketi | Turkey |
| Trinseo UK Limited | England and Wales |
| Altuglas LLC | USA – Delaware |
| Americas Styrenics LLC | USA – Delaware |
| Trinseo LLC | USA – Delaware |
| Trinseo Materials Finance, Inc. | USA – Delaware |
| Trinseo NA Finance LLC | USA – Delaware |
| Trinseo NA Finance SPV LLC | USA – Delaware |
| Trinseo U.S. Holding, Inc. | USA – Delaware |
| Trinseo U.S. Receivables Company SPV LLC | USA – Delaware |
| Aristech Surfaces LLC | USA – Kentucky |
From Exhibit 21 of the 10-K for 2025. Companies must list their significant subsidiaries there and may leave out smaller ones, so this is the company’s own list, not every entity it owns.
Read from Trinseo’s annual reports (10-K for 2025, 10-K for 2024, 10-K for 2023) and the financial data it files with the SEC, as of 2026-03-13. Every quotation is word for word from the filing linked beside it; how these pages are built and checked. The full record is in its company data sheet.