Bregje "Bee" Roseboom-Van Kessel
Senior Vice President, Corporate Finance & Investor Relations
+41 447183685 bvankessel@trinseo.com
John Dalhoff
Senior Manager, Investor Relations
610-240-3274 jddalhoff@trinseo.com
Transfer Agent
American Stock transfer & Trust Company, LLC
800-937-5449 718-921-8124 amstock.com Address: Operations Center 6201 15th Avenue Brooklyn, NY 11219