FINAL DEADLINE ALERT: The Schall Law Firm Encourages Investors in Trinseo PLC with Losses of $100,000 to Contact the Firm

LOS ANGELES, June 20, 2023

Investors who purchased the Company's securities between May 3, 2021 and March 27, 2023, inclusive (the "Class Period"), are encouraged to contact the firm before June 20, 2023.

If you are a shareholder who suffered a loss, click here to participate.

We also encourage you to contact Brian Schall of the Schall Law Firm, 2049 Century Park East, Suite 2460, Los Angeles, CA 90067, at 310-301-3335, to discuss your rights free of charge. You can also reach us through the firm's website at www.schallfirm.com, or by email at bschall@schallfirm.com.

The class, in this case, has not yet been certified, and until certification occurs, you are not represented by an attorney. If you choose to take no action, you can remain an absent class member.

According to the Complaint, the Company made false and misleading statements to the market. Trinseo's plant in Bristol, Pennsylvania, suffered from a troubled history of safety problems under its previous ownership, which continued to be plagued with safety problems after it was acquired. The Company failed to disclose the specific risks involved in this plant's normal operations. The Company was at risk of chemical spills and other problems due to its operation of an unsafe plant. Based on these facts, the Company's public statements were false and materially misleading throughout the class period. When the market learned the truth about Trinseo, investors suffered damages.