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
$69.406 B
0.07% of all US-listed value
Companies
13
Ranked #98 of 152 industries
Average
$5.339 B
Mean market cap per company
| # | Name | Market cap | Close | Session | Country |
|---|---|---|---|---|---|
| 1 | American Water WorksAWK | $26.9B | $135.31 | +0.36% | United States |
| 2 | Companhia De Saneamento Basico Do Estado De Sao Paulo-SabespSBS | $18.7B | $5.31 | -1.12% | Brazil |
| 3 | Essential UtilitiesWTRG | $11.4B | $40.04 | +0.40% | United States |
| 4 | American States WaterAWR | $3.46B | $87.39 | +2.01% | United States |
| 5 | California Water Service GroupCWT | $3.12B | $50.53 | +2.23% | United States |
| 6 | H2o AmericaHTO | $2.62B | $62.66 | +1.42% | United States |
| 7 | Middlesex WaterMSEX | $1.10B | $58.22 | +1.48% | United States |
| 8 | York WaterYORW | $513.8M | $31.70 | +0.28% | United States |
| 9 | Consolidated WaterCWCO | $487.8M | $30.49 | +1.91% | Cayman Islands |
| 10 | Artesian ResourcesARTNA | $357.8M | $34.66 | +0.76% | United States |
| 11 | CadizCDZI | $290.9M | $3.46 | +5.81% | United States |
| 12 | Pure CyclePCYO | $261.0M | $10.83 | +1.59% | United States |
| 13 | Global Water ResourcesGWRS | $218.6M | $7.60 | +1.88% | United States |
All 13 companies. One row per company — secondary share classes are folded into their primary listing. Updated 9 Aug 2026.
Sectors water supply companies sit in
Other industries
Semiconductors 100Computer Software: Programming Data Processing 77Computer Software: Prepackaged Software 232Computer Manufacturing 10Biotechnology: Pharmaceutical Preparations 501Major Banks 245Industrial Machinery/Components 209Catalog/Specialty Distribution 30Business Services 93Commercial Banks 35Auto Manufacturing 29Integrated oil Companies 18Investment Bankers/Brokers/Service 68Real Estate Investment Trusts 179Department/Specialty Retail Stores 14Oil & Gas Production 116Telecommunications Equipment 82Beverages (Production/Distribution) 35Electronic Components 21Finance: Consumer Services 163Electric Utilities: Central 59Consumer Electronics/Appliances 23Natural Gas Distribution 29Medical Specialities 44All industries →
Figures come from SEC filings and daily market prices. Companies listed only outside the US are not covered — see methodology.