Trinseo PLC (TSEOF): Nasdaq/NYSE listing notice — Trinseo receives NYSE non-compliance notice; market cap avg $35.6M, stock avg $0.99

Trinseo PLC

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.

item 3.01 item 7.01 item 8.01 item 9.01

Key facts

Extracted from this filing and checked against the source text.

Listing & Compliance Notices SEC 8-K Item 3.01 confidence 0.9

Trinseo PLC received a nyse deficiency notice notice regarding market value (rules 802.01B).

Exchange: nyse
Notice: deficiency notice
Deficiency: market value
Rules: 802.01B

Exact text from the filing

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

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Listing & Compliance Notices SEC 8-K Item 3.01 confidence 0.9

Trinseo PLC received a nyse deficiency notice notice regarding minimum bid price (rules 802.01C).

Exchange: nyse
Notice: deficiency notice
Deficiency: minimum bid price
Rules: 802.01C

Exact text from the filing

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

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5 listing & compliance notices filed in the last 30 days. Browse all listing & compliance notices →

Trinseo PLC filing history →

Source: SEC EDGAR

accession 0001104659-25-120876

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