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
$70.310 B
0.07% of all US-listed value
Companies
13
Ranked #96 of 152 industries
Average
$5.408 B
Mean market cap per company
| # | Name | Market cap | Close | Session | Country |
|---|---|---|---|---|---|
| 1 | American Water WorksAWK | $25.3B | $127.38 | -0.52% | United States |
| 2 | Companhia De Saneamento Basico Do Estado De Sao Paulo-SabespSBS | $22.5B | $6.37 | -0.62% | Brazil |
| 3 | Essential UtilitiesWTRG | $10.9B | $38.53 | -0.72% | United States |
| 4 | American States WaterAWR | $3.23B | $81.46 | -0.12% | United States |
| 5 | California Water Service GroupCWT | $2.81B | $45.40 | -0.33% | United States |
| 6 | H2o AmericaHTO | $2.43B | $57.98 | -0.34% | United States |
| 7 | Middlesex WaterMSEX | $1.00B | $53.14 | +0.45% | United States |
| 8 | York WaterYORW | $500.3M | $30.83 | +0.07% | United States |
| 9 | Consolidated WaterCWCO | $484.4M | $30.25 | -0.43% | Cayman Islands |
| 10 | Artesian ResourcesARTNA | $346.5M | $33.55 | -0.42% | United States |
| 11 | CadizCDZI | $306.5M | $3.62 | +3.43% | United States |
| 12 | Pure CyclePCYO | $264.1M | $10.96 | -0.27% | United States |
| 13 | Global Water ResourcesGWRS | $243.9M | $8.15 | +0.74% | United States |
All 13 companies. One row per company, with secondary share classes folded into their primary listing. Updated 9 Oct 2026.
Sectors water supply companies sit in
Other industries
Semiconductors 100Computer Software: Programming Data Processing 77Computer Software: Prepackaged Software 234Computer Manufacturing 10Biotechnology: Pharmaceutical Preparations 500Major Banks 245Industrial Machinery/Components 212Catalog/Specialty Distribution 30Business Services 92Commercial Banks 35Auto Manufacturing 29Integrated oil Companies 16Oil & Gas Production 116Investment Bankers/Brokers/Service 68Real Estate Investment Trusts 175Department/Specialty Retail Stores 13Telecommunications Equipment 84Electronic Components 21Beverages (Production/Distribution) 36Electric Utilities: Central 61Finance: Consumer Services 165Consumer Electronics/Appliances 23Biotechnology: Biological Products (No Diagnostic Substances) 160Medical Specialities 44All industries โ
Figures come from SEC filings and daily market prices. Companies listed only outside the US are not covered: see methodology.