Current Report · Items 5.07, 8.01 · 8-K
Trinseo PLC
TSEOFOTCEQUITYCurrent
Submission of Matters to a Vote of Security Holders · Other Events
ITEM 5.07 Submission of Matters to a Vote of Security Holders. Adjournment of Annual General Meeting On September 23, 2026, Trinseo PLC (the “Company”) convened its 2026 annual general meeting (the “Annual Meeting”). The Chair of the Annual Meeting adjourned the Annual Meeting to September 30, 2026 at 8:30 a.m.…
Filed Sep 23, 2026Accepted Sep 23, 2026, 1:30 PM EDTCIK 1519061Accession 0001104659-26-109915
Company context
Trinseo, a specialty material solutions provider, partners with companies to bring ideas to life in an imaginative, smart and sustainably focused manner by combining its premier expertise, forward-looking innovations and best-in-class materials to unlock value for companies and consumers. From design to manufacturing, Trinseo taps into decades of experience in diverse material solutions to address customers’ unique challenges in a wide range of industries, including building and construction, consumer goods, medical and mobility.
Current securities
Historical securities (1)
Disclosure sections
Items 5.07, 8.01Select an item to read the extracted section. The as-filed document remains the primary evidence.
Item 5.07Item 5.07 - Submission of Matters to Vote
ITEM 5.07 Submission of Matters to a Vote of Security Holders.
Adjournment of Annual General Meeting
On September 23, 2026, Trinseo PLC (the “Company”) convened its 2026 annual general meeting (the “Annual Meeting”). The Chair of the Annual Meeting adjourned the Annual Meeting to September 30, 2026 at 8:30 a.m. EST (the “Adjourned Annual Meeting”) in accordance with the Company’s constitution due to the failure of a quorum to be present in person or by proxy.
The Adjourned Annual Meeting is currently scheduled to be held at 440 E. Swedesford Rd., Suite 301, Wayne, Pennsylvania 19380, United States (with an audio and video link available for shareholders in Ireland at McCann FitzGerald LLP, Riverside One, Sir John Rogerson’s Quay, Grand Canal Dock, Dublin 2, D02 X576, Ireland at 1:30 p.m. IST). Only shareholders of record as of the close of business on July 30, 2026 are entitled to vote at or attend the Adjourned Annual Meeting. No changes have been made to the proposals that shareholders will vote on at the Adjourned Annual Meeting.
Item 8.01Item 8.01 - Other Events
Item 8.01 Other Events.
Adjournment of Extraordinary General Meeting
The Company convened an Extraordinary General Meeting of Shareholders (the “Extraordinary General Meeting”) on September 23, 2026 at 8:45 a.m. EST. The Chair of the Extraordinary General Meeting adjourned the meeting to September 30, 2026, at 8:45 a.m. EST (the “Adjourned Extraordinary General Meeting”) in accordance with the Company’s constitution due to the failure of a quorum to be present in person or by proxy.
The Adjourned Extraordinary General Meeting will be held at 440 E. Swedesford Rd., Suite 301, Wayne, Pennsylvania 19380, United States (with an audio and video link available for shareholders in Ireland at McCann FitzGerald LLP, Riverside One, Sir John Rogerson’s Quay, Grand Canal Dock, Dublin 2, D02 X576, Ireland at 1:45 p.m. IST). Only shareholders of record as of the close of business on August 12, 2026 are entitled to attend the Adjourned Extraordinary General Meeting. As previously disclosed, no resolutions are being proposed at the Adjourned Extraordinary General Meeting, and no substantive matter will be presented for a vote or otherwise acted upon.