---
schema_version: "secwatch.filing_event.v1"
accession: "0001558370-24-003114"
form_type: "8-K"
ticker: "TSEOF"
cik: "0001519061"
company_name: "Trinseo PLC"
filed_at: "2024-03-13T23:59:59+00:00"
generated_at: "2026-06-04T22:13:44.096692+00:00"
event_type: "m_and_a"
sentiment: "neutral"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# Trinseo starts sale process for 50% AmSty stake; expects deal by early 2025

## Summary
- Commenced sale of its 50% ownership in Americas Styrenics LLC via ownership exit provision in the JV agreement.
- Expected to lead to a definitive arrangement no later than early 2025.
- Proceeds to be used to pay down $1.077 billion of term loans maturing in 2028.
- AmSty is a joint venture with Chevron Phillips Chemical Company LP; part of Trinseo's styrenics businesses divestiture plan.

## SEC filing metadata
- accession: 0001558370-24-003114
- form_type: 8-K
- ticker: TSEOF
- cik: 0001519061
- company_name: Trinseo PLC
- filed_at: 2024-03-13T23:59:59+00:00
- event_type: m_and_a
- sentiment: neutral
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1519061/000155837024003114/0001558370-24-003114-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1519061/000155837024003114/tse-20240313x8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001558370-24-003114
- JSON: https://secwatch.observer/filing/0001558370-24-003114.json
- Plain text: https://secwatch.observer/filing/0001558370-24-003114.txt

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