secwatch.observer — SEC 8-K summary ====================================== Issuer: Trinseo PLC (TSEOF) CIK: 0001519061 Form: 8-K Filed at: 2026-09-30T16:00:37+00:00 Accession: 0001104659-26-112217 Event type: other_material Sentiment: negative Materiality: 0.65 Item codes: 5.07, 8.01 LLM model: deepseek-v4.1-flash:cloud@v2 Trinseo EGM convened under Irish law as net assets fall to half of share capital; AGM quorum 491,031 shares -------------------------------------------------------------------------------- - Extraordinary General Meeting convened under Section 1111 of the Irish Companies Act 2014 because Trinseo's net assets are half or less of called-up share capital; no resolutions proposed. - 2026 Annual General Meeting held September 30 after the September 23 meeting lacked quorum; only 491,031 shares present or represented, which set quorum under Article 88. - All eleven director nominees elected, including K'Lynne Johnson, Frank Bozich, Carol Flaton and Jill Frizzley; votes ranged from 487,709 to 491,031 in favor. - Say-on-pay approved 488,146 for vs 2,885 against; PricewaterhouseCoopers ratified as independent auditor for the year ending December 31, 2026, 491,031 for. - The AGM was further adjourned to a date to be determined; the Extraordinary General Meeting ended with no substantive matters voted on or acted upon. Source: EDGAR index: https://www.sec.gov/Archives/edgar/data/1519061/000110465926112217/0001104659-26-112217-index.htm Primary doc: https://www.sec.gov/Archives/edgar/data/1519061/000110465926112217/tse-20260930x8k.htm HTML page: https://secwatch.observer/filing/0001104659-26-112217 License: Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer