Pollution-Control-Equipment (4)
| Company | Ticker | 2026 | 2025 | 2024 | 2023 | 2022 |
|---|---|---|---|---|---|---|
| Donaldson Company Inc | DCI | 22% | 1% | 3% | 11% | -0% |
| Perma Pipe International Holdings Inc | PPIH | 120% | -3% | 90% | -18% | 9% |
| Fuel Tech Inc | FTEK | 28% | -2% | 0% | -17% | -9% |
| CECO Environmental Corp | CECE | 0% | 0% | 0% | 0% | 52% |