ROSEN, A RESPECTED AND LEADING FIRM, Encourages Trinseo PLC Investors to Inquire About Securities Class Action Investigation - TSE

NEW YORK, April 16, 2023

WHY: Rosen Law Firm, a global investor rights law firm, continues to investigate potential securities claims on behalf of shareholders of Trinseo PLC (NYSE: TSE) resulting from allegations that Trinseo may have issued materially misleading business information to the investing public.

SO WHAT: If you purchased Trinseo securities you may be entitled to compensation without payment of any out of pocket fees or costs through a contingency fee arrangement. The Rosen Law Firm is preparing a class action seeking recovery of investor losses.

WHAT TO DO NEXT: To join the prospective class action, go to https://rosenlegal.com/submit-form/?case_id=13711 or call Phillip Kim, Esq. toll-free at 866-767-3653 or email pkim@rosenlegal.com or cases@rosenlegal.com for information on the class action.

WHAT IS THIS ABOUT: On March 27, 2023, The Inquirer published an article entitled "Bristol plant that spilled chemicals into Philly's water supply had other mishaps over the last decade." The article reported "a chemical plant in Bristol that authorities said caused a toxic spill, threatening Philadelphia's drinking water, has a long history of mishaps – including at least four recent contamination incidents." In addition, the article stated "over the past decade, the U.S. Coast Guard twice before detected releases of acrylates [commonly used to produce glass-like acrylics] from the Bristol facility into the Delaware. The EPA had separately flagged two other acrylate releases." The article cites, "David Salas-de la Cruz, a Rutgers University associate professor of chemistry, worked at the Bristol plant during its Rohm and Haas days. He said the number of incidents over the past decade was unusual."

On this news, the price of Trinseo's stock fell $1.09, or 5.26%, to close at $19.62 per share on March 27, 2023.