---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-26-062804"
form_type: "8-K"
ticker: "TSEOF"
cik: "0001519061"
company_name: "Trinseo PLC"
filed_at: "2026-05-15T21:27:08+00:00"
generated_at: "2026-05-15T21:30:24.198625+00:00"
event_type: "other_material"
sentiment: "negative"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Trinseo extends securitization waiver expiration to May 27, 2026

## Summary
- Securitization waiver expiration extended from prior date to May 27, 2026, per counterparty confirmations.
- Extension obtained under terms of existing waiver agreement disclosed in March 2026 8-K.
- Company continues to pursue restructuring under previously announced Restructuring Support Agreement.
- Ordinary shares now trade OTC under symbol TSEOF after NYSE delisting on March 30, 2026.

## SEC filing metadata
- accession: 0001104659-26-062804
- form_type: 8-K
- ticker: TSEOF
- cik: 0001519061
- company_name: Trinseo PLC
- filed_at: 2026-05-15T21:27:08+00:00
- event_type: other_material
- sentiment: negative
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 1.01, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1519061/000110465926062804/0001104659-26-062804-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1519061/000110465926062804/tm2614854d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-26-062804
- JSON: https://secwatch.observer/filing/0001104659-26-062804.json
- Plain text: https://secwatch.observer/filing/0001104659-26-062804.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.