---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-25-120876"
form_type: "8-K"
ticker: "TSEOF"
cik: "0001519061"
company_name: "Trinseo PLC"
filed_at: "2025-12-15T23:59:59+00:00"
generated_at: "2026-05-16T13:12:31.065008+00:00"
event_type: "regulatory"
sentiment: "negative"
materiality_score: 0.9
calibrated_materiality_score: 0.9
confidence: "high"
source: SEC EDGAR
---

# Trinseo receives NYSE non-compliance notice; market cap avg $35.6M, stock avg $0.99

## Summary
- 30-day avg market cap $35.6M; stockholders' deficit $861.6M as of Sep 30, 2025.
- Avg closing price $0.99 over 30 days, below $1.00 minimum share price.
- Intends to submit market cap cure plan within 45 days (18-month cure) and notify NYSE within 10 days for share price cure (6 months).
- Trading continues during cure periods; symbol gets .BC indicator.

## SEC filing metadata
- accession: 0001104659-25-120876
- form_type: 8-K
- ticker: TSEOF
- cik: 0001519061
- company_name: Trinseo PLC
- filed_at: 2025-12-15T23:59:59+00:00
- event_type: regulatory
- sentiment: negative
- materiality_score: 0.9
- calibrated_materiality_score: 0.9
- confidence: high
- sec_items: 3.01, 7.01, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1519061/000110465925120876/0001104659-25-120876-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1519061/000110465925120876/tse-20251212x8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-25-120876
- JSON: https://secwatch.observer/filing/0001104659-25-120876.json
- Plain text: https://secwatch.observer/filing/0001104659-25-120876.txt

## Source-grounded claims
- claim_id: 2cb7fe1b52ba9ec90f66a7af30fd37dc1f35af98
  claim: Trinseo PLC received a nyse deficiency notice notice regarding market value (rules 802.01B).
  evidence_excerpt: December 12, 2025 Trinseo PLC (the “Company”) received a notice (the “Notice”) from the New York Stock Exchange (the “NYSE”) indicating the Company is not currently in compliance with two of the NYSE’s continued listing standards (the “Listing Standards”). ​ First, the Notice indicated that the Company was not currently in compliance with the Listing Standard set forth in Section 802.01B of the NYSE’s Listed Company Manual (the “Minimum Market Capitalization Standard”) due to the fact that the Company’s average global market capitalization over a consecutive 30 trading-day period was less than
  evidence_url: https://www.sec.gov/Archives/edgar/data/1519061/000110465925120876/0001104659-25-120876-index.htm
- claim_id: 356ec427a749219f3c19c0b098f4be040afda18c
  claim: Trinseo PLC received a nyse deficiency notice notice regarding minimum bid price (rules 802.01C).
  evidence_excerpt: December 12, 2025 Trinseo PLC (the “Company”) received a notice (the “Notice”) from the New York Stock Exchange (the “NYSE”) indicating the Company is not currently in compliance with two of the NYSE’s continued listing standards (the “Listing Standards”). ​ First, the Notice indicated that the Company was not currently in compliance with the Listing Standard set forth in Section 802.01B of the NYSE’s Listed Company Manual (the “Minimum Market Capitalization Standard”) due to the fact that the Company’s average global market capitalization over a consecutive 30 trading-day period was less than
  evidence_url: https://www.sec.gov/Archives/edgar/data/1519061/000110465925120876/0001104659-25-120876-index.htm

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