| Donaldson Company, Inc. | $9.5b | $89.11 | +3.5% | 626.3K | |
| Amentum Holdings, Inc. | $5.7b | $20.17 | -1.4% | 2.2M | |
| Perimeter Solutions, Inc. | $5.3b | $36.87 | +3.2% | 1.4M | |
| Ceco Environmental Corp | $2.7b | $95.50 | -0.5% | 552.3K | |
| Ecovyst Inc. | $1.4b | $12.14 | -4.0% | 5.2M | |
| Flowco Holdings Inc. | $1.0b | $20.98 | -2.3% | 528.7K | |
| Montrose Environmental Group, Inc. | $0.8b | $22.14 | 0.0% | 343.7K | |
| Hudson Technologies Inc | $223.8m | $5.57 | -4.1% | 371.8K | |
| Perma-Fix Environmental Services, Inc. | $208.1m | $12.62 | +10.7% | 503.2K | |
| Bridger Aerospace Group Holdings, Inc. Common Stock | $134.9m | $1.78 | -3.5% | 336.5K | |
| Arq, Inc. Common Stock | $118.5m | $2.27 | -3.4% | 693.9K | |
| Fuel Tech, Inc. | $46.1m | $1.86 | -1.6% | 288.5K | |
| Birchtech Corp. | $45.2m | $2.02 | +3.6% | 61.9K | |
| ClearSign Technologies Corporation Common Stock (DE) | $25.1m | $3.40 | 0.0% | 14.2K | |
| TOMI Environmental Solutions, Inc. | $20.2m | $0.72 | -4.9% | 88.8K | |
| LiqTech International, Inc. | $10.9m | $0.86 | -0.2% | 127.4K | |
| Euro Tech Holdings Co Ltd. New | $9.0m | $1.51 | 0.0% | 87.2K | |
| JE Cleantech Holdings Limited Ordinary Shares | $7.2m | $1.22 | 0.0% | 10.8K | |
| CleanCore Solutions Inc. | $6.4m | $0.81 | -2.2% | 1.5M |