First Quarter 2022 Financial Results & Outlook May 4, 2022 ™Trademark of Trinseo PLC or its affiliates Introductions & Disclosure Rules Introductions • Frank Bozich, President & CEO • David Stasse, Executive Vice President & CFO • Andy Myers, Director of Investor Relations Disclosure Rules Cautionary Note on Forward-Looking Statements.This presentation may contain forward-looking statements including, without limitation, statements concerning plans, objectives, goals, projections, forecasts, strategies, fut ...

Trinseo PLC (NYSE:TSE) Q1 2022 Earnings Conference Call May 5, 2022 10:00 AM ET Company Participants Andrew Myers - Director of Investor Relations Frank Bozich - President and Chief Executive Officer David Stasse - Executive Vice President and Chief Financial Officer Conference Call Participants Frank Mitsch - Fermium Research David Begleiter - Deutsche Bank Hassan Ahmed - Alembic Global Advisors Lawrence Alexander - Jeffries Angel Castillo - Morgan Stanley Matthew Blair - Tudor, Pickering, Holt & Company O ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2022 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-36473 Trinseo PLC (Exact name of registrant as specified in its charter) (State or other jurisdiction of inco ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended: December 31, 2021 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-36473 Trinseo PLC (Exact name of registrant as specified in its charter) Ireland N/A (State or other jurisdiction of incorporat ...

Fourth Quarter 2021 Financial Results & 2022 Outlook February 8, 2022 ™Trademark of Trinseo PLC or its affiliates Introductions & Disclosure Rules Introductions • Frank Bozich, President & CEO • David Stasse, Executive Vice President & CFO • Andy Myers, Director of Investor Relations Disclosure Rules Cautionary Note on Forward-Looking Statements.This presentation may contain forward-looking statements including, without limitation, statements concerning plans, objectives, goals, projections, forecasts, stra ...

Trinseo PLC (NYSE:TSE) Q4 2021 Earnings Conference Call February 9, 2022 10:00 AM ET Company Participants Andrew Myers - Director of Investor Relations Frank Bozich - President and Chief Executive Officer David Stasse - Executive Vice President and Chief Financial Officer Conference Call Participants Frank Mitsch - Fermium Research Hassan Ahmed - Alembic Global Advisors David Begleiter - Deutsche Bank Eric Petrie - Citigroup Matthew Blair - Tudor, Pickering, Holt & Co. Laurence Alexander - Jefferies Angel C ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2021 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-36473 Trinseo PLC (Exact name of registrant as specified in its charter) (State or other jurisdiction of ...

Trinseo PLC (NYSE:TSE) Q3 2021 Earnings Conference Call November 8, 2021 10:00 AM ET Company Participants Andrew Myers - Director of Investor Relations Frank Bozich - President & Chief Executive Officer David Stasse - Executive Vice President & Chief Financial Officer Conference Call Participants Frank Mitsch - Fermium Research Laurence Alexander - Jefferies Hassan Ahmed - Alembic Global Advisors David Begleiter - Deutsche Bank Duffy Fischer - Barclays Eric Petrie - Citigroup Angel Castillo - Morgan Stanley ...

Trinseo S.A. (NYSE:TSE) Q2 2021 Results Conference Call August 5, 2021 10:00 AM ET Company Participants Andrew Myers - Director, IR Frank Bozich - President, CEO & Director David Stasse - EVP & CFO Conference Call Participants Frank Mitsch - Fermium Research Matthew Blair - TPH Hassan Ahmed - Alembic Global David Begleiter - Deutsche Bank Eric Petrie - Citi Angel Castillo - Morgan Stanley Operator Good morning, ladies and gentlemen, and welcome to the Trinseo Second Quarter 2021 Financial Results Conference ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2021 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-36473 Trinseo S.A. (Exact name of registrant as specified in its charter) Luxembourg N/A (State or other juris ...