Trinseo PLC 8-K

What Happened

• On March 13, 2026, Trinseo PLC issued a press release announcing its financial results for the fourth quarter and year ended December 31, 2026. The press release is furnished as Exhibit 99.1 to the Form 8-K, and an investor presentation is furnished as Exhibit 99.2. The Form 8-K states these materials are being furnished (not filed) and are therefore not subject to Section 18 liability or automatically incorporated by reference in other filings. The report is signed by David Stasse, Executive Vice President and Chief Financial Officer.

Key Details

• Filing date: March 13, 2026 (Form 8-K).
• Items reported: Item 2.02 (Results of Operations and Financial Condition) and Item 9.01 (Exhibits).
• Exhibits provided: Press Release (Exhibit 99.1) and Investor Presentation (Exhibit 99.2); interactive XBRL cover page included as Exhibit 101.
• Signed by: David Stasse, EVP & CFO.

Why It Matters

• This 8-K furnishes Trinseo’s latest quarterly and full-year earnings materials—primary sources for updated revenue, earnings, cash flow and management commentary. Retail investors should review the press release and investor presentation (Exhibits 99.1/99.2) to see the company’s reported results and any management discussion or guidance. Because the materials are furnished (not filed), investors should also look for the company’s subsequent periodic filings (e.g., 10-Q/10-K) for audited and formally filed financial statements and disclosures.