Form 8-K Filing Summary

This Form 8-K filing by Trinseo PLC reports on the extension of expiration dates for several waiver agreements. Specifically, the waivers for the super-priority revolving credit facility and the senior credit facility have been extended to May 13, 2026. Additionally, the waiver for the refinance credit facility has also been extended to May 13, 2026. The securitization facility waiver has been extended to May 14, 2026. These extensions were made in accordance with the terms of the existing waiver agreements, and no new agreements were entered into. The filing also notes the delisting of the company's ordinary shares from the NYSE, which became effective on March 30, 2026, with trading continuing over the counter.