Pollution-Control-Equipment (4)
| Company | Ticker | 2025 | 2024 | 2023 | 2022 | 2021 |
|---|---|---|---|---|---|---|
| Donaldson Company Inc | DCI | 1% | 3% | 11% | -0% | 6% |
| Perma Pipe International Holdings Inc | PPIH | -3% | 90% | -18% | 9% | 43% |
| Fuel Tech Inc | FTEK | -2% | 0% | -17% | -9% | -64% |
| CECO Environmental Corp | CECE | 0% | 0% | 0% | 52% | -11% |