Trinseo annual meeting adjourned after quorum miss

• Trinseo held its annual general meeting on Sept. 23, 2026, then adjourned it to Sept. 30, 2026 due to no quorum.
• Shareholder proposals at the annual meeting were not adopted; the adjourned meeting will revisit the same agenda.
• An extraordinary general meeting was also held on Sept. 23, 2026, then adjourned to Sept. 30, 2026 due to no quorum.
• No resolutions were presented at the extraordinary meeting, leaving no items adopted or executed.

Disclaimer: This news brief was created by Public Technologies (PUBT) using generative artificial intelligence. While PUBT strives to provide accurate and timely information, this AI-generated content is for informational purposes only and should not be interpreted as financial, investment, or legal advice. Trinseo plc published the original content used to generate this news brief via EDGAR, the Electronic Data Gathering, Analysis, and Retrieval system operated by the U.S. Securities and Exchange Commission (Ref. ID: 0001104659-26-109915), on September 23, 2026, and is solely responsible for the information contained therein.