Trinseo(TSE) - 2025 Q2 - Quarterly Results

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 ($) | | (2.95) | | (1.92) | | Adjusted Net Loss* | | (76) | | (52) | | Adjusted EPS ($)* | | ...