Quick Answer
Trinseo PLC reported Shares Outstanding of 36.00 million shares for fiscal year 2025.
Trinseo PLC Shares Outstanding — Annual History
| Fiscal Year | Shares Outstanding | YoY Change |
|---|---|---|
| 2025 | 36.00M | +1.7% |
| 2024 | 35.40M | +0.6% |
| 2023 | 35.20M | +0.3% |
| 2022 | 35.10M | -7.4% |
| 2021 | 37.90M | -1.3% |
| 2020 | 38.40M | -1.5% |
| 2019 | 39.00M | -6.2% |
| 2018 | 41.60M | -4.1% |
| 2017 | 43.40M | -2.0% |
| 2016 | 44.30M | -9.2% |
| 2015 | 48.78M | — |
Quarterly Shares Outstanding
| Quarter Ending | Shares Outstanding | YoY | QoQ |
|---|---|---|---|
| September 30, 2025 | 36.00M | +1.7% | +0.0% |
| June 30, 2025 | 36.00M | +1.7% | +1.1% |
| March 31, 2025 | 35.60M | +0.8% | +0.6% |
| December 31, 2024 | 35.40M | +0.6% | +0.0% |
| September 30, 2024 | 35.40M | +0.6% | +0.0% |
| June 30, 2024 | 35.40M | +0.6% | +0.3% |
| March 31, 2024 | 35.30M | +0.3% | +0.3% |
| December 31, 2023 | 35.20M | +0.3% | +0.0% |
- Trinseo PLC showed an increase of +1.7% in Shares Outstanding compared to the prior fiscal year.
- Over the 2015–2025 period, Trinseo PLC’s shares outstanding has declined by 26.2% (from 48.78 million shares to 36.00 million shares).
- The most recent figure is from Trinseo PLC’s fiscal year 2025 report (Form 10-K), filed with the SEC on March 13, 2026.
- All figures are sourced from SEC EDGAR XBRL filings, last verified June 17, 2026.
Last verified: