Trinseo PLC SEC filings TSEOQ
Trinseo PLC has 1,001 filings in SEC EDGAR's recent list, going back to Jun 15, 2015. Its latest annual report, Form ARS, was filed on Aug 7, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Aug 6, 2026, covering the quarter ended Jun 30, 2026. The most recent current report (Form 8-K) was filed on Oct 27, 2026 (other events). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| S-8 | Employee stock plan registration | Aug 7, 2025 | — |
| S-8 | Employee stock plan registration | Aug 4, 2023 | — |
| S-8 | Employee stock plan registration | Aug 9, 2022 | — |
| S-8 POS | Filing | Oct 8, 2021 | — |
| S-8 POS | Filing | Oct 8, 2021 | — |
| S-8 POS | Filing | Oct 8, 2021 | — |
| S-8 | Employee stock plan registration | Jul 30, 2020 | — |
| S-8 | Employee stock plan registration | Jul 31, 2019 | — |
| 424B7 | Filing | Sep 21, 2016 | — |
| 424B7 | Filing | Sep 19, 2016 | — |
| 424B7 | Filing | Aug 10, 2016 | — |
| 424B7 | Filing | Aug 9, 2016 | — |
| 424B7 | Filing | May 11, 2016 | — |
| 424B7 | Filing | May 9, 2016 | — |
| 424B7 | Filing | Mar 23, 2016 | — |
| FWP | Free writing prospectus | Mar 21, 2016 | — |
| 424B7 | Filing | Mar 21, 2016 | — |
| FWP | Free writing prospectus | Mar 21, 2016 | — |
| S-3 | Shelf registration | Mar 15, 2016 | — |
Showing 19 filings. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Plastic Materials, Synth Resins & Nonvulcan Elastomers (SIC 2821)
- Listed as
- TSEOQ (OTC)
- Fiscal year ends
- December 31
- Incorporated in
- Ireland
- Headquarters
- Wayne, PA
- SEC filer status
- Accelerated filer
- SEC CIK
- 1519061
- Former names
- Trinseo S.A. (until Oct 18, 2021)
Other Plastic Materials, Synth Resins & Nonvulcan Elastomers companies
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- DuPont de Nemours, Inc. DD
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- Eastman Chemical Co EMN
- Hexcel Corp /DE/ HXL
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- PureCycle Technologies, Inc. PCT
All 12 Plastic Materials, Synth Resins & Nonvulcan Elastomers companies
Source: SEC EDGAR filings. This is company-reported data, not investment advice.