| 1 | VLTO | Veralto Corporation | 21.76B | -0.19% | 1,165,018 | 5.50B |
| 2 | ZWS | Zurn Elkay Water Solutions Corporation | 8.76B | -0.55% | 3,439,112 | 1.74B |
| 3 | FSS | Federal Signal Corporation | 7.06B | -0.68% | 269,209 | 2.18B |
| 4 | CECO | CECO Environmental Corp. | 2.31B | 0.13% | 404,703 | 774.38M |
| 5 | PCT | PureCycle Technologies, Inc. | 1.31B | 0.55% | 3,199,225 | 8.36M |
| 6 | ERII | Energy Recovery, Inc. | 595.91M | 2.45% | 1,679,156 | 134.99M |
| 7 | ADUR | Aduro Clean Technologies Inc. | 403.53M | 1.44% | 299,338 | 177.37K |
| 8 | ARQ | Arq, Inc. | 98.12M | -0.43% | 205,591 | 120.34M |
| 9 | ZONE | CleanCore Solutions, Inc. | 63.59M | 0.53% | 1,199,415 | 3.42M |
| 10 | SCWO | 374Water Inc. | 51.80M | 2.77% | 28,259 | 215.04K |
| 11 | FTEK | Fuel Tech, Inc. | 42.06M | 0.75% | 188,918 | 26.68M |
| 12 | BCHT | Birchtech Corp. | 40.77M | 1.97% | 642,377 | 17.63M |
| 13 | CLIR | ClearSign Technologies Corporation | 27.04M | -3.10% | 5,724 | 5.23M |
| 14 | LIQT | LiqTech International, Inc. | 21.09M | -0.47% | 21,141 | 16.51M |
| 15 | RAIN | Rain Enhancement Technologies Holdco, Inc. | 19.24M | - | 4,322 | - |
| 16 | TOMZ | TOMI Environmental Solutions, Inc. | 12.51M | 1.47% | 653,334 | 5.64M |
| 17 | CLWT | Euro Tech Holdings Company Limited | 9.43M | -1.58% | 1,091 | 14.01M |
| 18 | DEVS | DevvStream Corp. | 1.62M | -11.09% | 818,861 | 33.94K |
