Trinseo S.A. Uncategorized Contracts & Agreements

Description of Securities (Filed With SEC on February 27, 2023)

Description of Securities (Filed With SEC on February 23, 2022)

Warranty Agreement, by and between Trinseo S.A. and Arkema S.A., dated March 19, 2021 (Filed With SEC on March 22, 2021)

Letter agreement between Trinseo LLC and Angelo N. Chaclas concerning voluntary reduction of salary (Filed With SEC on February 22, 2021)

Letter agreement between Trinseo LLC and David Stasse concerning voluntary reduction of salary (Filed With SEC on February 22, 2021)

Letter agreement between Trinseo LLC and Frank A. Bozich concerning voluntary reduction of salary (Filed With SEC on February 22, 2021)

Put Option Agreement, by and between Trinseo S.A. and Arkema S.A. dated December 14, 2020 (Filed With SEC on December 17, 2020)

Agreement between Timothy Stedman and Trinseo Europe GmbH dated January 1, 2020 (Filed With SEC on May 8, 2020)

Agreement between Trinseo, LLC and Angelo Chaclas dated January 1, 2020 (Filed With SEC on May 8, 2020)

Description of Securities (Filed With SEC on February 28, 2020)

Form of Executive Side Letter for Equity Grants (Filed With SEC on August 9, 2019)

Bain Capital Everest US Holding, Inc. (Filed With SEC on November 18, 2015)

Styron LLC 1000 ChesterbrookBlvd, Suite 300 Berwyn, Pennsylvania 19312 May 30, 2014 (Filed With SEC on June 2, 2014)

1000 ChesterbrookBoulevard, Suite 300, Berwyn, PA 19312 (Filed With SEC on June 2, 2014)

TRINSEO S.A. CASHINCENTIVE PLAN (Filed With SEC on May 16, 2014)

Additional abbreviations may also be used though not in the above list. (Filed With SEC on May 16, 2014)

TRINSEO S.A. CASHINCENTIVE PLAN (Filed With SEC on May 5, 2014)

Styron Restoration andElective Deferral Plan Effective July 1, 2011 TABLE OF CONTENTS (Filed With SEC on May 5, 2014)

Additional abbreviations may also be used though not in the above list. (Filed With SEC on May 5, 2014)