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 |
|---|---|---|---|
| SD | Specialized disclosure (conflict minerals) | May 22, 2026 | — |
| 25-NSE | Delisting notice | Mar 18, 2026 | — |
| SD | Specialized disclosure (conflict minerals) | May 23, 2025 | — |
| UPLOAD | Letter from the SEC | Jun 21, 2024 | — |
| CORRESP | Letter to the SEC | Jun 12, 2024 | — |
| UPLOAD | Letter from the SEC | Jun 7, 2024 | — |
| CORRESP | Letter to the SEC | Jun 5, 2024 | — |
| UPLOAD | Letter from the SEC | May 29, 2024 | — |
| 15-12B | Deregistration | Oct 18, 2021 | — |
| 25-NSE | Delisting notice | Oct 8, 2021 | — |
| 8-K12B | Filing | Oct 8, 2021 | Oct 8, 2021 |
| UPLOAD | Letter from the SEC | Jun 15, 2021 | — |
| CORRESP | Letter to the SEC | May 12, 2021 | — |
| UPLOAD | Letter from the SEC | May 6, 2021 | — |
| UPLOAD | Letter from the SEC | Nov 8, 2016 | — |
| CORRESP | Letter to the SEC | Nov 7, 2016 | — |
| CORRESP | Letter to the SEC | Oct 26, 2016 | — |
| UPLOAD | Letter from the SEC | Oct 20, 2016 | — |
| CORRESP | Letter to the SEC | Oct 4, 2016 | — |
| UPLOAD | Letter from the SEC | Sep 20, 2016 | — |
| SC TO-I/A | Filing | Apr 26, 2016 | — |
| CORRESP | Letter to the SEC | Apr 12, 2016 | — |
| UPLOAD | Letter from the SEC | Apr 11, 2016 | — |
| CORRESP | Letter to the SEC | Apr 5, 2016 | — |
| UPLOAD | Letter from the SEC | Apr 4, 2016 | — |
| SC TO-I | Filing | Mar 28, 2016 | — |
| SC TO-C | Filing | Mar 23, 2016 | — |
| SC TO-C | Filing | Mar 21, 2016 | — |
| EFFECT | Filing | Mar 18, 2016 | — |
| UPLOAD | Letter from the SEC | Mar 17, 2016 | — |
| CORRESP | Letter to the SEC | Mar 16, 2016 | — |
| UPLOAD | Letter from the SEC | Sep 22, 2015 | — |
| CORRESP | Letter to the SEC | Sep 18, 2015 | — |
| UPLOAD | Letter from the SEC | Sep 8, 2015 | — |
Showing 34 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
- Dow Inc. DOW
- DuPont de Nemours, Inc. DD
- Albemarle Corp ALB
- Eastman Chemical Co EMN
- Hexcel Corp /DE/ HXL
- Avient Corp AVNT
- Rogers Corp ROG
- 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.