World

Top 66 largest Companies in the Utilities—Regulated Water industry in the World by Market Cap

This is the list of the largest public listed companies in the Utilities—Regulated Water industry in the world by market capitalization with links to their reference stock.

World Utilities—Regulated Water Industry Analysis
World Top Companies World Companies Analysis

Top Utilities—Regulated Water Companies in the World as of Jan. 01, 2026

Rank Company Market Cap (USD) Country Sector Industry
1 American Water Works Company, Inc. $25.44 B United States US Utilities US Utilities—Regulated Water
2 Companhia de Saneamento Básico do Estado de São Paulo - SABESP $17.11 B Brazil Brazilian Utilities Brazilian Utilities—Regulated Water
3 Severn Trent plc $11.38 B United Kingdom UK Utilities UK Utilities—Regulated Water
4 United Utilities Group plc $11.06 B United Kingdom UK Utilities UK Utilities—Regulated Water
5 Essential Utilities, Inc. $10.94 B United States US Utilities US Utilities—Regulated Water
6 Pennon Group plc $3.38 B United Kingdom UK Utilities UK Utilities—Regulated Water
7 Grandblue Environment Co. Ltd $3.37 B China Chinese Utilities Chinese Utilities—Regulated Water
8 Beijing Enterprises Water Group Ltd $3.26 B Hong Kong HK Utilities HK Utilities—Regulated Water
9 Chongqing Water Group Co.,Ltd. $3.07 B China Chinese Utilities Chinese Utilities—Regulated Water
10 Companhia de Saneamento de Minas Gerais $3.02 B Brazil Brazilian Utilities Brazilian Utilities—Regulated Water
11 American States Water Company $2.80 B United States US Utilities US Utilities—Regulated Water
12 California Water Service Group $2.56 B United States US Utilities US Utilities—Regulated Water
13 Companhia de Saneamento do Parana - SANEPAR $2.21 B Brazil Brazilian Utilities Brazilian Utilities—Regulated Water
14 SJW Group $1.88 B

(July 1, 2025)

 United States US Utilities US Utilities—Regulated Water
15 Companhia Catarinense de Águas e Saneamento - CASAN $1.84 B Brazil Brazilian Utilities Brazilian Utilities—Regulated Water
16 Jiangxi Hongcheng Environment Co.,Ltd. $1.74 B China Chinese Utilities Chinese Utilities—Regulated Water
17 Alkhorayef Water & Power Technologies $1.25 B Saudi Arabia Saudi Arabian Utilities Saudi Arabian Utilities—Regulated Water
18 China Water Affairs Group Ltd $1.23 B Hong Kong HK Utilities HK Utilities—Regulated Water
19 TTW PCL $1.15 B Thailand Thai Utilities Thai Utilities—Regulated Water
20 Inversiones Aguas Metropolitanas SA $1.12 B Chile Chilean Utilities Chilean Utilities—Regulated Water
21 Athens Water Supply and Sewerage Company SA $983.1 M Greece Greece Utilities Greece Utilities—Regulated Water
22 Beijing Water Business Doctor Co. Ltd $962.6 M China Chinese Utilities Chinese Utilities—Regulated Water
23 Middlesex Water Company $921.8 M United States US Utilities US Utilities—Regulated Water
24 Suntar Environmental Technology Co. Ltd $795.6 M China Chinese Utilities Chinese Utilities—Regulated Water
25 Qian Jiang Water Resources Development Co;Ltd $751.5 M China Chinese Utilities Chinese Utilities—Regulated Water
26 Jiangsu Jiangnan Water Co. Ltd $746.5 M China Chinese Utilities Chinese Utilities—Regulated Water
27 Wuhan Sanzhen Industry Holding Co.,Ltd $725.0 M China Chinese Utilities Chinese Utilities—Regulated Water
28 Dayu Water-saving Group Co. Ltd $673.3 M China Chinese Utilities Chinese Utilities—Regulated Water
29 Premium Water Holdings,Inc. $636.6 M Japan Japanese Utilities Japanese Utilities—Regulated Water
30 Guangxi Nanning Waterworks Co. Ltd $628.1 M China Chinese Utilities Chinese Utilities—Regulated Water

Top Utilities—Regulated Water Companies in the World as of Jan. 01, 2026

1. American Water Works Company, Inc.

Company Profile: American Water Works Company, Inc.
Market Cap (USD): $25.44 B
Country: United States
Sector: US Utilities
Industry: US Utilities—Regulated Water

2. Companhia de Saneamento Básico do Estado de São Paulo - SABESP

Company Profile: Companhia de Saneamento Básico do Estado de São Paulo - SABESP
Market Cap (USD): $17.11 B
Country: Brazil
Sector: Brazilian Utilities
Industry: Brazilian Utilities—Regulated Water

3. Severn Trent plc

Company Profile: Severn Trent plc
Market Cap (USD): $11.38 B
Country: United Kingdom
Sector: UK Utilities
Industry: UK Utilities—Regulated Water

4. United Utilities Group plc

Company Profile: United Utilities Group plc
Market Cap (USD): $11.06 B
Country: United Kingdom
Sector: UK Utilities
Industry: UK Utilities—Regulated Water

5. Essential Utilities, Inc.

Company Profile: Essential Utilities, Inc.
Market Cap (USD): $10.94 B
Country: United States
Sector: US Utilities
Industry: US Utilities—Regulated Water

6. Pennon Group plc

Company Profile: Pennon Group plc
Market Cap (USD): $3.38 B
Country: United Kingdom
Sector: UK Utilities
Industry: UK Utilities—Regulated Water

7. Grandblue Environment Co. Ltd

Company Profile: Grandblue Environment Co. Ltd
Market Cap (USD): $3.37 B
Country: China
Sector: Chinese Utilities
Industry: Chinese Utilities—Regulated Water

8. Beijing Enterprises Water Group Ltd

Company Profile: Beijing Enterprises Water Group Ltd
Market Cap (USD): $3.26 B
Country: Hong Kong
Sector: HK Utilities
Industry: HK Utilities—Regulated Water

9. Chongqing Water Group Co.,Ltd.

Company Profile: Chongqing Water Group Co.,Ltd.
Market Cap (USD): $3.07 B
Country: China
Sector: Chinese Utilities
Industry: Chinese Utilities—Regulated Water

10. Companhia de Saneamento de Minas Gerais

Company Profile: Companhia de Saneamento de Minas Gerais
Market Cap (USD): $3.02 B
Country: Brazil
Sector: Brazilian Utilities
Industry: Brazilian Utilities—Regulated Water

11. American States Water Company

Company Profile: American States Water Company
Market Cap (USD): $2.80 B
Country: United States
Sector: US Utilities
Industry: US Utilities—Regulated Water

12. California Water Service Group

Company Profile: California Water Service Group
Market Cap (USD): $2.56 B
Country: United States
Sector: US Utilities
Industry: US Utilities—Regulated Water

13. Companhia de Saneamento do Parana - SANEPAR

Company Profile: Companhia de Saneamento do Parana - SANEPAR
Market Cap (USD): $2.21 B
Country: Brazil
Sector: Brazilian Utilities
Industry: Brazilian Utilities—Regulated Water

14. SJW Group

Company Profile: SJW Group
Market Cap (USD): $1.88 B (July 1, 2025)
Country: United States
Sector: US Utilities
Industry: US Utilities—Regulated Water

15. Companhia Catarinense de Águas e Saneamento - CASAN

Company Profile: Companhia Catarinense de Águas e Saneamento - CASAN
Market Cap (USD): $1.84 B
Country: Brazil
Sector: Brazilian Utilities
Industry: Brazilian Utilities—Regulated Water

16. Jiangxi Hongcheng Environment Co.,Ltd.

Company Profile: Jiangxi Hongcheng Environment Co.,Ltd.
Market Cap (USD): $1.74 B
Country: China
Sector: Chinese Utilities
Industry: Chinese Utilities—Regulated Water

17. Alkhorayef Water & Power Technologies

Company Profile: Alkhorayef Water & Power Technologies
Market Cap (USD): $1.25 B
Country: Saudi Arabia
Sector: Saudi Arabian Utilities
Industry: Saudi Arabian Utilities—Regulated Water

18. China Water Affairs Group Ltd

Company Profile: China Water Affairs Group Ltd
Market Cap (USD): $1.23 B
Country: Hong Kong
Sector: HK Utilities
Industry: HK Utilities—Regulated Water

19. TTW PCL

Company Profile: TTW PCL
Market Cap (USD): $1.15 B
Country: Thailand
Sector: Thai Utilities
Industry: Thai Utilities—Regulated Water

20. Inversiones Aguas Metropolitanas SA

Company Profile: Inversiones Aguas Metropolitanas SA
Market Cap (USD): $1.12 B
Country: Chile
Sector: Chilean Utilities
Industry: Chilean Utilities—Regulated Water

21. Athens Water Supply and Sewerage Company SA

Company Profile: Athens Water Supply and Sewerage Company SA
Market Cap (USD): $983.1 M
Country: Greece
Sector: Greece Utilities
Industry: Greece Utilities—Regulated Water

22. Beijing Water Business Doctor Co. Ltd

Company Profile: Beijing Water Business Doctor Co. Ltd
Market Cap (USD): $962.6 M
Country: China
Sector: Chinese Utilities
Industry: Chinese Utilities—Regulated Water

23. Middlesex Water Company

Company Profile: Middlesex Water Company
Market Cap (USD): $921.8 M
Country: United States
Sector: US Utilities
Industry: US Utilities—Regulated Water

24. Suntar Environmental Technology Co. Ltd

Company Profile: Suntar Environmental Technology Co. Ltd
Market Cap (USD): $795.6 M
Country: China
Sector: Chinese Utilities
Industry: Chinese Utilities—Regulated Water

25. Qian Jiang Water Resources Development Co;Ltd

Company Profile: Qian Jiang Water Resources Development Co;Ltd
Market Cap (USD): $751.5 M
Country: China
Sector: Chinese Utilities
Industry: Chinese Utilities—Regulated Water

26. Jiangsu Jiangnan Water Co. Ltd

Company Profile: Jiangsu Jiangnan Water Co. Ltd
Market Cap (USD): $746.5 M
Country: China
Sector: Chinese Utilities
Industry: Chinese Utilities—Regulated Water

27. Wuhan Sanzhen Industry Holding Co.,Ltd

Company Profile: Wuhan Sanzhen Industry Holding Co.,Ltd
Market Cap (USD): $725.0 M
Country: China
Sector: Chinese Utilities
Industry: Chinese Utilities—Regulated Water

28. Dayu Water-saving Group Co. Ltd

Company Profile: Dayu Water-saving Group Co. Ltd
Market Cap (USD): $673.3 M
Country: China
Sector: Chinese Utilities
Industry: Chinese Utilities—Regulated Water

29. Premium Water Holdings,Inc.

Company Profile: Premium Water Holdings,Inc.
Market Cap (USD): $636.6 M
Country: Japan
Sector: Japanese Utilities
Industry: Japanese Utilities—Regulated Water

30. Guangxi Nanning Waterworks Co. Ltd

Company Profile: Guangxi Nanning Waterworks Co. Ltd
Market Cap (USD): $628.1 M
Country: China
Sector: Chinese Utilities
Industry: Chinese Utilities—Regulated Water

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