Largest water supply companies
Every US-listed water supply company we cover, 13 of them, ranked by market capitalisation, with revenue and earnings taken from their SEC filings.
Combined market cap
$67.960 B
0.07% of all US-listed value
Companies
13
Ranked #97 of 152 industries
Average
$5.228 B
Mean market cap per company
| # | Name | Market cap | Close | Session | Country |
|---|---|---|---|---|---|
| 1 | American Water WorksAWK | $26.4B | $133.06 | -0.57% | United States |
| 2 | Companhia De Saneamento Basico Do Estado De Sao Paulo-SabespSBS | $18.2B | $5.17 | -4.08% | Brazil |
| 3 | Essential UtilitiesWTRG | $11.4B | $40.18 | -0.49% | United States |
| 4 | American States WaterAWR | $3.30B | $83.24 | -1.36% | United States |
| 5 | California Water Service GroupCWT | $2.85B | $46.07 | -2.58% | United States |
| 6 | H2o AmericaHTO | $2.60B | $62.20 | -1.14% | United States |
| 7 | Middlesex WaterMSEX | $1.01B | $53.65 | -2.31% | United States |
| 8 | York WaterYORW | $502.0M | $30.93 | -2.09% | United States |
| 9 | Consolidated WaterCWCO | $449.8M | $28.09 | -1.75% | Cayman Islands |
| 10 | Artesian ResourcesARTNA | $348.5M | $33.75 | -1.60% | United States |
| 11 | CadizCDZI | $323.5M | $3.82 | +3.52% | United States |
| 12 | Pure CyclePCYO | $265.1M | $11.00 | -0.90% | United States |
| 13 | Global Water ResourcesGWRS | $241.8M | $8.08 | -2.53% | United States |
All 13 companies. One row per company, with secondary share classes folded into their primary listing. Updated 24 Sept 2026.
Sectors water supply companies sit in
Other industries
Semiconductors 101Computer Software: Programming Data Processing 77Computer Software: Prepackaged Software 234Computer Manufacturing 10Biotechnology: Pharmaceutical Preparations 500Major Banks 246Industrial Machinery/Components 211Catalog/Specialty Distribution 31Business Services 93Commercial Banks 35Auto Manufacturing 29Integrated oil Companies 18Investment Bankers/Brokers/Service 68Oil & Gas Production 116Real Estate Investment Trusts 177Department/Specialty Retail Stores 14Telecommunications Equipment 82Electronic Components 21Beverages (Production/Distribution) 36Finance: Consumer Services 162Electric Utilities: Central 60Consumer Electronics/Appliances 23Biotechnology: Biological Products (No Diagnostic Substances) 160Natural Gas Distribution 29All industries โ
Figures come from SEC filings and daily market prices. Companies listed only outside the US are not covered: see methodology.