Company facts
- Headquarters
- Wayne, Pennsylvania
- Most recent report
- 8-K, filed Sep 23, 2026
- Filings on record
- 1,000+ filings
- On EDGAR
- CIK 1519061
- Fiscal year ends
- December
- Filer status
- Accelerated filer
Financials 8 of 48
News 8 of 197
- 8-K Shareholder vote results Sep 23, 2026
- 8-K Other events Aug 14, 2026
- 8-K Quarterly results Aug 6, 2026
- 8-K Other events Jul 17, 2026
- 8-K/A Current report on a material event, amended Jun 12, 2026
- 8-K Significant contract Jun 1, 2026
- 8-K Current report on a material event May 26, 2026
- 8-K Significant contract May 15, 2026
Prospectuses and Registrations 8 of 13
- 25-NSE Notice that a security was delisted Mar 18, 2026
- S-8 Registration statement for an employee plan Aug 7, 2025
- S-8 Registration statement for an employee plan Aug 4, 2023
- S-8 Registration statement for an employee plan Aug 9, 2022
- 25-NSE Notice that a security was delisted Oct 8, 2021
- S-8 POS Post-effective amendment to an employee plan registration Oct 8, 2021
- S-8 POS Post-effective amendment to an employee plan registration Oct 8, 2021
- S-8 POS Post-effective amendment to an employee plan registration Oct 8, 2021
Proxies 8 of 43
- DEFA14A Extra proxy material Aug 7, 2026
- DEF 14A Proxy statement for a shareholder vote Aug 7, 2026
- DEFA14A Extra proxy material Apr 29, 2025
- DEF 14A Proxy statement for a shareholder vote Apr 29, 2025
- PRE 14A Preliminary proxy statement Apr 18, 2025
- DEFA14A Extra proxy material Apr 29, 2024
- DEF 14A Proxy statement for a shareholder vote Apr 29, 2024
- PRE 14A Preliminary proxy statement Apr 19, 2024
Ownership 8 of 657
- SCHEDULE 13G/A Large holder reported a passive stake, amended May 15, 2026
- 4 Insider reported a trade May 14, 2026
- 4 Insider reported a trade May 14, 2026
- 4 Insider reported a trade May 14, 2026
- 4 Insider reported a trade May 14, 2026
- 4 Insider reported a trade May 14, 2026
- 4 Insider reported a trade May 14, 2026
- 4 Insider reported a trade May 14, 2026
Other 8 of 42
- ARS Annual report sent to shareholders Aug 7, 2026
- SD Conflict minerals disclosure May 22, 2026
- SD Conflict minerals disclosure May 23, 2025
- ARS Annual report sent to shareholders Apr 29, 2025
- UPLOAD Comment letter from SEC staff Jun 21, 2024
- CORRESP Reply to SEC staff Jun 12, 2024
- UPLOAD Comment letter from SEC staff Jun 7, 2024
- CORRESP Reply to SEC staff Jun 5, 2024
Everything here comes from Trinseo PLC's own filings on SEC EDGAR. The filing list is rechecked every hour.