Here are the 8-K filings from Trinseo PLC (TSEOQ) in our archive since June 2025, newest first, and each one links through to the document itself with the summary and the scores our analysis gives it.
An 8-K covers material events a company has to report between its quarterly reports, so if you follow TSEOQ and want that one kind of document rather than the whole filing history, this is the page to keep. The company's other filings, of every form, are on the full TSEOQ filings page.
Trinseo PLC (TSEOQ) reported third-quarter 2026 net sales of $778.7 million, up 5% year over year, and a net loss of $49.1 million, versus $109.7 million. Adjusted EBITDA was $51.0 million, compared with $30.4 million. The company linked higher sales to pricing that passed through higher raw-material costs and commercial initiatives; lower volumes in Polymer Solutions and Engineered Materials reflected weak end-market demand and customer purchases pulled into the second quarter.
Quarterly operating cash flow was $25.9 million and free cash flow was $14.6 million, versus a $38.1 million use a year earlier; approximately $50 million of professional fees tied to the debt restructuring process affected free cash flow. For the first nine months of 2026, operating activities used $322.3 million, compared with $125.0 million. The quarter included $43.2 million in reorganization items and $56 million of lower interest expense resulting from the automatic stay associated with debt restructuring proceedings. At September 30, 2026, liabilities subject to compromise were $2,559.2 million. The company said ordinary-course operations were supported by court-approved all-trade motions and liquidity remained consistent with the second quarter.
Trinseo PLC convened its 2026 annual general meeting on September 30, 2026, and adjourned it until November 20, 2026, at 9:00 a.m. EST to allow presentation of its audited financial statements for the fiscal year ended December 31, 2025. The adjourned meeting will be held in Wayne, Pennsylvania, with an audio and video link for shareholders in Ireland. Only shareholders of record as of July 30, 2026, are entitled to attend. The only business will be laying the annual financial statements and the related directors’ and auditors’ reports; no proposals will be voted on.
Trinseo PLC held its 2026 annual general meeting on September 30 after the meeting originally scheduled for September 23 was adjourned because a quorum was not present. A total of 491,031 shares were present or represented by proxy, constituting a quorum under Article 88. Shareholders elected 11 director nominees for terms expiring at the end of the 2027 annual general meeting, approved named executive officer compensation on an advisory basis, and ratified PricewaterhouseCoopers LLP as the independent registered public accounting firm for the year ending December 31, 2026. A binding vote authorized the Audit Committee to set auditor remuneration. The annual meeting was further adjourned to a date to be determined.
Trinseo also held its extraordinary general meeting on September 30 after it was adjourned from September 23 for lack of a quorum. The meeting was convened under Section 1111 of the Irish Companies Act 2014 to consider measures in a situation where a public limited company’s net assets are half or less of its called-up share capital. No resolutions were proposed, and no substantive matters were presented for a vote or otherwise acted upon.
Trinseo PLC adjourned its 2026 annual general meeting and extraordinary general meeting on September 23, 2026, after a quorum was not present in person or by proxy. The adjourned annual meeting is scheduled for September 30, 2026, at 8:30 a.m. EST. Shareholders of record as of July 30, 2026, may attend or vote, and the proposals are unchanged.
The adjourned extraordinary general meeting is scheduled for September 30, 2026, at 8:45 a.m. EST. Shareholders of record as of August 12, 2026, may attend. No resolutions are being proposed, and no substantive matter will be presented for a vote or otherwise acted upon.
Trinseo PLC reported that on August 7, 2026, a standalone calculation showed its net assets are half or less of its called-up share capital. Under Section 1111 of the Irish Companies Act 2014, this requires the board to convene an extraordinary general meeting to consider what measures, if any, should be taken.
The company mailed notice on August 14, 2026 to shareholders of record as of August 12, 2026, calling an Extraordinary General Meeting on September 23, 2026 at its Wayne, Pennsylvania offices, with audio/video participation available in Dublin. The meeting’s stated purpose is discussion only; no resolutions or shareholder votes will be presented.
Trinseo PLC reported second quarter 2026 net sales of $845 million, up 8% from a year earlier, as higher prices and favorable currency offset volume declines from closing virgin MMA production in Italy and a force majeure outage at the Tessenderlo polystyrene plant. Net loss was $120 million, $14 million worse than prior year, including $89 million of pre-tax charges tied to reorganization, debt restructuring and asset programs.
Adjusted EBITDA rose to $81.0 million from $41.6 million, mainly from margin improvements in Polymer Solutions and Engineered Materials and savings from earlier restructuring actions. However, cash used in operating activities was $115.3 million and Free Cash Flow was negative $125.3 million, pressured by $85 million of debt and other restructuring fees and an $80 million working capital increase.
At June 30, 2026, total assets were $2,498.6 million, liabilities subject to compromise were $2,562.3 million, and shareholders’ equity showed a deficit of $1,347.2 million, reflecting court-supervised financial restructuring supported by a DIP Facility. Management highlights ongoing efforts to complete a balance sheet restructuring and enhance long-term financial flexibility.
Trinseo PLC plans to hold its annual general meeting of shareholders on September 23, 2026 at 8:30 a.m. EST. Shareholders of record as of July 30, 2026 will be entitled to participate.
The meeting will take place at the company’s headquarters at 440 East Swedesford Road, Suite 301, Wayne, Pennsylvania 19087, with shareholders in Ireland able to join via audio and video link at McCann FitzGerald LLP in Dublin. Shareholders who plan to attend must register in advance, with further details to be provided in the company’s proxy statement.
Trinseo PLC filed an amended current report to correct its earlier submission related to a financing agreement. The Form 8-K/A, labeled Amendment No. 1, is being used solely to refile Exhibit 10.2 so that typographical errors in the names of certain guarantors on the signature pages are corrected.
The corrected Exhibit 10.2 covers a Senior Secured Super-Priority Debtor-In-Possession HoldCo Credit Agreement dated May 28, 2026, among Trinseo PLC, various financing subsidiaries, guarantors, lenders, and Alter Domus (US) LLC as administrative and collateral agent. No other disclosures from the original report are changed.