Largest Environmental Solutions Companies by Market Cap
Even the five largest environmental solutions firms combined hold only an estimated 10–17% of global market share, making this one of the most fragmented sectors on public markets. The industry spans solid waste collection and recycling, hazardous waste treatment, water and wastewater management, environmental remediation, and waste-to-energy conversion.
Most of the largest environmental solutions companies trade on the NYSE and NASDAQ, with Veolia Environnement — the world’s largest environmental services company by revenue — listed on Euronext Paris.
- Solid waste & recycling: Waste Management (WM), Republic Services (RSG), Waste Connections (WCN), GFL Environmental (GFL), Casella Waste Systems (CWST)
- Hazardous waste & industrial services: Clean Harbors (CLH), which also serves environmental remediation markets
- Water, waste & energy services: Veolia Environnement (VIE), recognized as a leader in hazardous waste, water treatment, and wastewater treatment simultaneously
- Environmental engineering & remediation: Tetra Tech (TTEK), the largest US company by market share in remediation and environmental cleanup services
Regulatory compliance is the primary demand driver across the sector — governments require businesses to meet environmental standards covering pollution, emissions, waste, and resource depletion. The hazardous waste sub-sector is expected to grow faster than waste management overall as regulations tighten worldwide. Emerging growth areas include PFAS remediation, battery-recycling logistics, and organics processing.
For those interested in related sectors, see our pages on recycling and waste management companies and global water utilities. The iShares Breakthrough Environmental Solutions ETF (ETEC), managed by BlackRock, tracks companies involved in breakthrough environmental technologies including energy efficiency, green transportation, and pollution prevention.
Regulated brokerThe following table lists the largest global publicly traded environmental solutions companies by market capitalization. It includes companies traded on the NYSE, NASDAQ, Euronext Paris, and other major exchanges. All data — including price and market cap — updates regularly to reflect current market conditions.
| Stock | Price | Marketcap | Change % |
|---|---|---|---|
 Greenwave Technology Solutions, GWAV | $3.13 | 2.60M | 3.64% |
 Waste Connections WCN | $166.36 | 42.27B | 0.92% |
 Xylem XYL | $116.62 | 27.72B | 0.15% |
GFL Environmental GFL | $36.82 | 13.29B | 1.34% |
 Casella Waste Systems CWST | $92.87 | 5.91B | 1.57% |
 PureCycle Technologies PCT | $7.60 | 1.53B | 2.44% |
 Energy Recovery ERII | $8.81 | 454.11M | 0.11% |
 Enviri Corporation NVRI | $21.95 | 617.10M | 0.45% |
Pure Cycle (water) PCYO | $10.86 | 261.77M | 3.29% |
Perma-Fix Environmental Services PESI | $13.45 | 285.19M | 9.80% |
 Aduro Clean Technologies Inc. ADUR | $15.18 | 538.03M | 0.20% |
 Origin Materials ORGN | $0.95 | 5.23M | 9.57% |
American Battery Technology Company ABAT | $2.65 | 360.82M | 2.76% |
 Quest Resource Holding QRHC | $1.25 | 26.34M | 0.81% |
 Flexible Solutions Internationa FSI | $6.76 | 86.11M | 0.88% |
 Rain Enhancement Technologies H RAIN | $1.99 | 20.58M | 3.11% |
 374Water SCWO | $1.86 | 32.54M | 3.63% |
 Loop Industries LOOP | $0.97 | 46.89M | 16.87% |
Fuel Tech, Inc. FTEK | $2.05 | 63.89M | 4.65% |
 TOMI Environmental Solutions, I TOMZ | $0.752 | 17.37M | 4.69% |
LiqTech International, Inc. LIQT | $0.812 | 26.75M | 5.59% |
Aqua Metals, Inc. AQMS | $2.99 | 10.07M | 4.34% |
Avalon Holdings Corporation AWX | $2.46 | 9.59M | 0.81% |
Smart Powerr Corp. CREG | $2.16 | 5.93M | 2.70% |
Sky Quarry Inc. SKYQ | $3.67 | 17.60M | 27.43% |
Aptiv APTV | $59.36 | 12.56B | 1.59% |
 Johnson Controls JCI | $140.19 | 85.53B | 1.29% |
Waste Management WM | $222.72 | 89.44B | 1.25% |
First Solar FSLR | $232.40 | 24.97B | 2.79% |
Trane Technologies TT | $479.75 | 106.05B | 0.39% |
 Linde LIN | $510.72 | 236.13B | 1.71% |
Autodesk ADSK | $196.30 | 41.45B | 0.02% |
Constellation Energy CEG | $260.14 | 92.90B | 1.47% |
Eaton ETN | $410.84 | 159.53B | 2.03% |
 Tesla TSLA | $408.85 | 1.54T | 7.67% |