Exhibit 21.1
SUBSIDIARIES OF TRINSEO PLC
AS OF DECEMBER 31, 2023
Entity Name | Jurisdiction |
1. Trinseo Belgium B.V. | Belgium |
2. Trinseo Operating Belgium B.V. | Belgium |
3. Trinseo Canada ULC | Canada |
4. Styron Synthetic Materials (Shanghai) Company Limited | China |
5. Trinseo Polymers (Zhangjiagang) Company Limited | China |
6. Altuglas International Denmark A/S | Denmark |
7. Trinseo Suomi Oy | Finland |
8. Altuglas International SAS | France |
9. Styron Operating France SAS | France |
10. Trinseo France S.A.S. | France |
11. Trinseo Deutschland Anlagengesellschaft mbH | Germany |
12. Trinseo Deutschland GmbH | Germany |
13. Trinseo Deutschland RE GmbH & Co. KG | Germany |
14. Trinseo Deutschland RE GP GmbH | Germany |
15. Trinseo (Hong Kong) Limited | Hong Kong |
16. Trinseo Materials (Hong Kong) Limited | Hong Kong |
17. Trinseo India Trading Private Limited | India |
18. PT Trinseo Materials Indonesia | Indonesia |
19. PT Trinseo Operating Indonesia | Indonesia |
20. Styron Ireland IBH Limited | Ireland |
21. Trinseo Finance Ireland Unlimited Company | Ireland |
22. Trinseo Ireland Global IHB Limited | Ireland |
23. Trinseo Ireland Holdings Limited | Ireland |
24. Trinseo Services Ireland Limited | Ireland |
25. A.P.I. Applicazioni Plastiche Industriali S.p.A. | Italy |
26. Altuglas S.r.l. | Italy |
27. Styron Operating Italy S.r.l. | Italy |
28. Trinseo Italia S.R.L. | Italy |
29. Trinseo Japan Y.K. | Japan |
30. Trinseo Korea Ltd. | Korea |
31. Trinseo Holding S.à r.l. | Luxembourg |
32. Trinseo Luxco S.à r.l. | Luxembourg |
33. Trinseo Luxco Finance SPV S.à r.l. | Luxembourg |
34. Trinseo Materials Operating S.C.A. | Luxembourg |
35. Altuglas Mexico, S.A. de C.V. | Mexico |
36. Trinseo de México S. de R.L. de C.V. | Mexico |
37. Heathland B.V. | The Netherlands |
38. Styron Netherlands Holding Company B.V. | The Netherlands |
39. Styron Operating Netherlands B.V. | The Netherlands |
40. Trinseo Holding B.V. | The Netherlands |
41. Trinseo Netherlands B.V. | The Netherlands |
42. Styron Poland sp. z.o.o. | Poland |
43. Trinseo Holdings Asia Pte. Ltd. | Singapore |
44. Trinseo Singapore Pte. Ltd. | Singapore |
45. Trinseo Spain S.L. | Spain |
46. Trinseo Sverige AB | Sweden |
47. Styron Europe Holding GmbH | Switzerland |
48. Styron Export Operating GmbH | Switzerland |
49. Trinseo Europe GmbH | Switzerland |
50. Trinseo Export GmbH | Switzerland |
51. Taiwan Trinseo Limited | Taiwan |
52. Styron Operating Kimya Ticaret Limited Sirketi | Turkey |
53. Trinseo Kimya Ticaret Limited Şirketi | Turkey |
54. Trinseo UK Limited | England and Wales |
55. Altuglas LLC | USA – Delaware |
56. Americas Styrenics LLC1 | USA – Delaware |
57. Trinseo LLC | USA – Delaware |
58. Trinseo Materials Finance, Inc. | USA – Delaware |
59. Trinseo NA Finance LLC | USA – Delaware |
60. Trinseo NA Finance SPV LLC | USA – Delaware |
61. Trinseo U.S. Holding, Inc. | USA – Delaware |
62. Trinseo U.S. Receivables Company SPV LLC | USA – Delaware |
63. Aristech Surfaces LLC | USA – Kentucky |
1 Represents a joint venture company of which the registrant indirectly owns 50% of the voting equity.