The WACC of Trinseo SA (TSE) is 7.8%.
| Range | Selected | |
| Cost of equity | 36.60% - 46.10% | 41.35% |
| Tax rate | 16.90% - 19.90% | 18.40% |
| Cost of debt | 4.10% - 7.00% | 5.55% |
| WACC | 6.4% - 9.3% | 7.8% |
| Category | Low | High |
| Long-term bond rate | 4.2% | 4.7% |
| Equity market risk premium | 5.0% | 6.0% |
| Adjusted beta | 6.49 | 6.82 |
| Additional risk adjustments | 0.0% | 0.5% |
| Cost of equity | 36.60% | 46.10% |
| Tax rate | 16.90% | 19.90% |
| Debt/Equity ratio | 10.1 | 10.1 |
| Cost of debt | 4.10% | 7.00% |
| After-tax WACC | 6.4% | 9.3% |
| Selected WACC | 7.8% | |