---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-26-109915"
form_type: "8-K"
ticker: "TSEOF"
cik: "0001519061"
company_name: "Trinseo PLC"
filed_at: "2026-09-23T17:30:36+00:00"
generated_at: "2026-09-23T17:31:08.270951+00:00"
event_type: "other"
sentiment: "neutral"
materiality_score: 0.15
calibrated_materiality_score: 0.15
confidence: "high"
source: SEC EDGAR
---

# Trinseo adjourns annual and extraordinary shareholder meetings to Sept 30 due to quorum failure

## Summary
- Annual General Meeting adjourned Sept 23 to Sept 30 8:30 a.m. EST; quorum not met.
- Extraordinary General Meeting also adjourned to Sept 30 8:45 a.m. EST; no quorum.
- No changes to annual meeting proposals; extraordinary meeting has no resolutions to vote.
- Record dates: July 30 for annual meeting; Aug 12 for extraordinary meeting.

## SEC filing metadata
- accession: 0001104659-26-109915
- form_type: 8-K
- ticker: TSEOF
- cik: 0001519061
- company_name: Trinseo PLC
- filed_at: 2026-09-23T17:30:36+00:00
- event_type: other
- sentiment: neutral
- materiality_score: 0.15
- calibrated_materiality_score: 0.15
- confidence: high
- sec_items: 5.07, 8.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1519061/000110465926109915/0001104659-26-109915-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1519061/000110465926109915/tse-20260923x8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-26-109915
- JSON: https://secwatch.observer/filing/0001104659-26-109915.json
- Plain text: https://secwatch.observer/filing/0001104659-26-109915.txt

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