secwatch.observer — SEC 8-K summary ====================================== Issuer: Trinseo PLC (TSEOF) CIK: 0001519061 Form: 8-K Filed at: 2025-04-04T23:59:59+00:00 Accession: 0001558370-25-004485 Event type: other_material Sentiment: neutral Materiality: 0.45 Item codes: 5.02, 9.01 LLM model: deepseek-v4-flash:cloud@v2 Trinseo board members De Leener and Tomkins retire; board to shrink to nine --------------------------------------------------------------------------- - Pierre-Marie De Leener and Mark Tomkins will retire at 2025 AGM and not stand for reelection. - Board size will decrease to nine members following the annual general meeting. - De Leener served since Trinseo's 2014 IPO; Tomkins served since 2019. - Retirements not due to any disagreement with the company on operations or policies. Source: EDGAR index: https://www.sec.gov/Archives/edgar/data/1519061/000155837025004485/0001558370-25-004485-index.htm Primary doc: https://www.sec.gov/Archives/edgar/data/1519061/000155837025004485/tse-20250403x8k.htm HTML page: https://secwatch.observer/filing/0001558370-25-004485 License: Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer