Table of Contents Washington, D.C. 20549 FORM 10-Q (Mark One) ☐ 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 UNITED STATES SECURITIES AND EXCHANGE COMMISSION ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2025 or Trinseo PLC (Exact name of registrant as specified in its charter) Ireland N/A (State or other jurisdict ...

Trinseo (TSE) Q2 2025 Earnings Call August 07, 2025 10:00 AM ET Speaker0Good morning, ladies and gentlemen, and welcome to the Trinseo Second Quarter twenty twenty five Financial Results Conference Call. We welcome the Trinseo management team, Frank Bozich, President and CEO David Stasey, Executive Vice President and CFO and Bea Van Kessel, Senior Vice President, Corporate Finance and Investor Relations. Today's conference call will include brief remarks by the management team followed by a question and ans ...

1 Trademark of Trinseo PLC or its affiliates Second Quarter 2025 Financial Results & Full Year 2025 Outlook Introductions & Disclosure Rules August 6, 2025 Introductions • Bee van Kessel, Senior Vice President, Corporate Finance & Investor Relations Disclosure Rules This presentation may contain forward-looking statements including, without limitation, statements concerning plans, objectives, goals, projections, forecasts, strategies, future events or performance, and underlying assumptions and other statem ...

Exhibit 99.1 Contact: Bee van Kessel Tel: + 1 835 235 0735 Email: bvankessel@trinseo.com Trinseo Reports Second Quarter 2025 Financial Results and Provides 2025 Outlook Second Quarter 2025 Highlights | | Three Months Ended | | | | | --- | --- | --- | --- | --- | | | June 30, | | | | | $millions, except per share data | 2025 | | 2024 | | | Net Sales | $ | 784 | $ | 920 | | Net Loss | | (106) | | (68) | | Diluted EPS ($) | | (2.95) | | (1.92) | | Adjusted Net Loss* | | (76) | | (52) | | Adjusted EPS ($)* | | ...

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, 2025 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 ...

Trinseo (TSE) Q1 2025 Earnings Call May 08, 2025 10:00 AM ET Company Participants Bregje Roseboom-Van Kessel - SVP Corporate Development, Investor RelationsFrank Bozich - President & Chief Executive OfficerDavid Stasse - EVP & CFOMatthew Blair - Managing DirectorDan Rizzo - Senior Vice PresidentFrank Mitsch - President Conference Call Participants Hassan Ahmed - Senior Equity Analyst Operator Good morning, ladies and gentlemen, and welcome to the Trinseo First Quarter twenty twenty five Financial Results Co ...

Financial Data and Key Metrics Changes - Adjusted EBITDA for Q1 2025 improved to $65 million, up $20 million year-over-year, driven by restructuring actions, improved business mix, and a polycarbonate licensing agreement [6][10][12] - Free cash flow was negative $119 million in Q1, influenced by $25 million related to refinancing and a typical seasonal working capital outflow of $84 million [11][12] Business Line Data and Key Metrics Changes - Volume in recycled content products grew by 33% year-over-year, and consumer electronics applications saw a 43% increase [7] - PMMA resin volumes in Asia more than doubled, while case volumes grew by 3% despite flat demand [7] - Latex Binders adjusted EBITDA remained similar to the prior year despite lower volumes, primarily due to improved sales mix and cost savings initiatives [10] - Polymer Solutions adjusted EBITDA was above the prior year, supported by $26 million in polycarbonate licensing income [10] Market Data and Key Metrics Changes - In China, specialized PMMA products contributed to a 50% volume growth year-over-year [9] - Demand for paper and board applications in China weakened significantly due to tariff announcements, impacting overall performance [10][54] Company Strategy and Development Direction - The company is focused on geographic expansion, material replacement, process change, and sustainability to drive growth in specialized technologies [7] - The strategic partnership with Deepak Chemtech is viewed as a significant opportunity for growth in India [7] - The company is committed to higher growth and higher margin business segments, particularly in specialty and sustainable offerings [16] Management's Comments on Operating Environment and Future Outlook - Management expressed confidence in navigating uncertain business conditions and highlighted the impact of restructuring actions on performance [16] - The company withdrew its full-year guidance due to increased economic and geopolitical uncertainty, providing only a Q2 adjusted EBITDA outlook of $55 million to $70 million [16] Other Important Information - The company anticipates little direct impact from proposed tariffs, as over 95% of product sales are produced within the region where they are sold [13] - The company is exploring additional licensing opportunities related to recycling technologies [41] Q&A Session Summary Question: Volume patterns ahead of tariffs - Management noted no evidence of pre-buying to beat tariffs, with Q1 demand continuing into Q2 [21] Question: Free cash flow guidance for Q2 - Management expressed confidence in achieving breakeven free cash flow in Q2, supported by working capital management [22] Question: Impact of styrene closures - Management indicated no significant negative impact from styrene closures, as the company is no longer a styrene producer in Europe [24] Question: Amsty performance and sale process - Management confirmed ongoing commitment to market Amsty and maximize asset value, with expectations for improved performance in Q2 [28][31] Question: Battery binders opportunity - Management highlighted investments in anode binders for lithium-ion batteries, indicating a growing business with a unique global footprint [34] Question: Full-year cash flow outlook - Management provided insights on cash outflows and indicated that working capital actions could offset any EBITDA deterioration [39] Question: Additional licensing deals - Management confirmed interest in recycling technologies and potential future licensing opportunities [41]

Q1 2025 Financial Performance - The company reported a net loss of $79 million and a diluted EPS of negative $2.22, which included $25 million in refinancing costs related to debt transactions completed in January 2025 [7] - Adjusted EBITDA was $65 million, exceeding the prior year by $20 million, driven by $26 million in polycarbonate technology licensing income and restructuring actions, but partially offset by lower equity income from Americas Styrenics and reduced volume [7] - Cash used in operations amounted to $110 million, and capital expenditures were $9 million, resulting in a negative Free Cash Flow of $119 million, including seasonal working capital build and $25 million in refinancing-related costs [7] - Net sales for Q1 2025 were $785 million, compared to $904 million in Q1 2024 [21] Q2 2025 Outlook - The company anticipates a net loss ranging from $61 million to $46 million and an Adjusted EBITDA between $55 million and $70 million [7] - The company expects seasonally higher volumes compared to Q1 and approximately breakeven Free Cash Flow [7] Sales Volume Analysis - Overall sales volume experienced a year-over-year decrease of 13% [21] - Consumer electronics sales volume increased by 43% [14] - Sales volumes sold to CASE applications accounted for 15% of total segment net sales, with volumes increasing 3% over prior year in a flat demand environment [28] - Sales volumes in Battery Binders up >3.5x versus prior year [28] Debt and Liquidity - The company's first quarter ending cash was $128 million (of which $2 million was restricted) and total liquidity of $421 million [7] - The company has $1933 million in Term Loans 2L Senior Secured Notes due 2029 [36] - The company has $445 million in Revolving Credit Facility [36] Full-Year 2025 Guidance - Due to increased tariff and geopolitical uncertainty, the company is withdrawing all full-year guidance furnished in connection with its debt refinancing transaction [42] - The company estimates capital expenditures of $65 million, cash interest of $195 million, cash taxes of $35 million, restructuring costs of $45 million, turnaround costs of $10 million, and working capital/other costs of $20 million, resulting in net cash expenditures of $370 million [43]

Trinseo (TSE) came out with a quarterly loss of $1.37 per share versus the Zacks Consensus Estimate of a loss of $1.40. This compares to loss of $1.94 per share a year ago. These figures are adjusted for non-recurring items.This quarterly report represents an earnings surprise of 2.14%. A quarter ago, it was expected that this plastics and latex maker would post a loss of $2.30 per share when it actually produced a loss of $2.67, delivering a surprise of -16.09%.Over the last four quarters, the company has ...

Exhibit 99.1 Contact: Bee van Kessel Tel: +41 44 718 3685 Email: bvankessel@trinseo.com Trinseo Reports First Quarter 2025 Financial Results and Provides Second Quarter Outlook First Quarter 2025 Highlights ● Net loss of $79 million and EPS of negative $2.22 included $25 million of refinancing costs for the debt transactions that closed in January 2025 ● Adjusted EBITDA* of $65 million was $20 million above prior year driven by $26 million of polycarbonate technology licensing income as well as savings from ...