| 1 | Saint Paul Regional Water Services | USA | Saint Paul | 1900 Rice St | Ramsey | 55113 | stpaul.***** | 1885 | $82,392,738,000 | 247 | N/A | N/A | N/A |
| 2 | Hera SPA | Italy | Bologna | Viale Carlo Berti Pichat 2/4 | Bologna | 40127 | gruppohera.***** | 1925 | $13,809,362,467 | 3,052 | N/A | N/A | IT04245520376 |
| 3 | Companhia De Saneamento Basico Do Estado De Sao Paulo Sabesp | Brazil | Sao Paulo | Rua Costa Carvalho 300 | São Paulo | 05429-000 | sabesp.***** | 1973 | $6,144,170,319 | 14,753 | N/A | N/A | 43776517000180 |
| 4 | American Water Works Company, INC. | USA | Camden | 1 Water St | Camden | 08102 | amwater.***** | 1886 | $4,684,000,000 | 6,700 | N/A | N/A | 352210 |
| 5 | Mainova AG | Germany | Frankfurt am Main | Solmsstr. 38 | Frankfurt am Main, Stadt | 60486 | mainova.***** | 2024 | $4,079,349,800 | 3,421 | N/A | N/A | 60313B7173 |
| 6 | Thames Water Utilities LIMITED | Unitedkingdom | Reading | Clearwater Court | Reading | RG1 8DB | thameswater.***** | 1989 | $3,195,875,320 | 7,934 | N/A | N/A | 02366661 |
| 7 | Korea Water Resources CORPORATION | Southkorea | Daejeon | 200 Sintanjin-ro, Daedeok-gu | Daejeon | 34350 | N/A | 1988 | $3,136,058,142 | 6,216 | N/A | N/A | 3068200471 |
| 8 | Gelsenwasser AG | Germany | Gelsenkirchen | Willy-brandt-allee 26 | Gelsenkirchen, Stadt | 45891 | gw-energienetze.***** | 2016 | $3,128,743,169 | 1,728 | N/A | N/A | 45879B165 |
| 9 | Severn Trent Water LIMITED | Unitedkingdom | Coventry | 2 St John S Street | Coventry, West Midlands | CV1 2LZ | stwater.***** | 1989 | $2,800,423,793 | 8,763 | N/A | N/A | 02366686 |
| 10 | United Utilities Water LIMITED | Unitedkingdom | Wright'S Green | Haweswater House | Warrington | WA5 3LP | unitedutilities.***** | 1989 | $2,705,549,918 | 6,060 | N/A | N/A | 02366678 |
| 11 | Thames Water LIMITED | Unitedkingdom | Reading | Clearwater Court | Reading | RG1 8DB | thameswater.***** | 1989 | $2,456,272,144 | 11,573 | N/A | N/A | 02366623 |
| 12 | Epcor Utilities INC | Canada | Edmonton | 2000-10423 101 St Nw | Alberta | T5H 0E8 | epcor.***** | 1995 | $2,420,064,640 | 60 | N/A | N/A | N/A |
| 13 | Guangdong Investment LIMITED | Hongkong | Sheung Wan | 28 & 29/f Guangdong Investment Twr | Central & Western District | N/A | N/A | 1973 | $2,378,318,762 | 190 | N/A | N/A | 03755183 |
| 14 | Veolia Eau - Compagnie Generale Des Eaux | France | Paris | 21 Rue la Boetie | Paris | 75008 | N/A | 1957 | $2,200,657,252 | 7,154 | N/A | N/A | 57202552610945 |
| 15 | Suez Eau France | France | Puteaux | Altiplano | Hauts-de-seine | 92800 | N/A | 1996 | $2,197,813,427 | 6,993 | N/A | N/A | 41003460704252 |
| 16 | Jining Water Supply Group General Company | China | Jining | Shuiwu Building, No.23, Hongxing M. Road, Zhong District | Shandong | 272000 | N/A | 1993 | $2,167,288,128 | 89 | N/A | N/A | 370800018001058 |
| 17 | Veolia Water Americas, LLC | USA | Houston | 4760 World Houston Pkwy | Harris | 77032 | veolianorthamerica.***** | 2012 | $2,140,300,781 | 3,200 | N/A | N/A | 930929498 |
| 18 | Veolia Water North America Operating Services, LLC | USA | Boston | 53 State St Ste 14 | Suffolk | 02109 | veolianorthamerica.***** | 1986 | $2,114,031,046 | 2,425 | N/A | N/A | 2102102 |
| 19 | Essential Utilities, INC. | USA | Bryn Mawr | 762 W Lancaster Ave | Montgomery | 19010 | aquaamerica.***** | 1968 | $2,086,113,000 | 3,291 | N/A | N/A | 231702594 |
| 20 | Scottish Water | Unitedkingdom | Halbeath | Castle House | Fife | KY11 8GG | scottishwater.***** | 2002 | $1,994,790,464 | 4,321 | N/A | N/A | N/A |
| 21 | Chengdu Environmental Investment Group Co.,ltd. | China | Chengdu | 1080 Jincheng Avenue, High Tech Zone | Sichuan | 610041 | N/A | 2002 | $1,776,754,811 | 130 | N/A | N/A | 510100000095202 |
| 22 | Sinohydro Bureau 10 Co.,ltd. | China | Chengdu | No.7, Bridge 12 Road, Jinniu District | Sichuan | 610032 | N/A | 1980 | $1,704,373,865 | 4,002 | N/A | N/A | 510181000004647 |
| 23 | Uisce Éireann | Ireland | Dublin | Arkle House | Dublin | D01 NP86 | water.***** | 2013 | $1,696,016,069 | 1,478 | N/A | N/A | 530363 |
| 24 | Saur | France | Issy-les-moulineaux | 11 Chemin de Bretagne | Hauts-de-seine | 92130 | saur.***** | 1986 | $1,678,291,343 | 6,115 | N/A | N/A | 33937998405975 |
| 25 | Shanghai Chengtou Water (group) Co.,ltd. | China | Shanghai | No. 50 Jinling East Road, Huangpu District | Shanghai | 200002 | N/A | 2014 | $1,666,335,414 | 177 | N/A | N/A | 310110000676661 |
| 26 | Yorkshire Water Services LIMITED | Unitedkingdom | Esholt | Western House | Bradford, West Yorkshire | BD6 2SZ | yorkshirewater.***** | 1989 | $1,643,721,509 | 3,876 | N/A | N/A | 02366682 |
| 27 | Grandblue Environment Co.,ltd. | China | Foshan | Hanlan Square, No. 23 Ronghe Road, Guicheng, Nanhai District | Guangdong | 528200 | N/A | 1992 | $1,640,504,152 | 18,610 | N/A | N/A | 440682000088499 |
| 28 | Berliner Wasserbetriebe | Germany | Berlin | Neue Judenstr. 1 | Berlin, Stadt | 10179 | bwb.***** | 2014 | $1,619,694,683 | 4,896 | N/A | N/A | 10623A30951B |
| 29 | China Water Affairs Group LIMITED | Hongkong | Wan Chai District | Rm 6408 64/f Central Plz | Wan Chai District | N/A | N/A | 1999 | $1,499,150,426 | 260 | N/A | N/A | 30358794 |
| 30 | Shenzhen Water (group) Company LTD. | China | Shenzhen | 23f, Wande Tower, Shennan Middle Road, Futian Dist. | Guangdong | 518031 | N/A | 1981 | $1,471,087,043 | 363 | N/A | N/A | 440301501129214 |
| 31 | Mekorot Water Company LTD. | Israel | Tel Aviv-yafo | 9 Lincoln | Tel Aviv District | 6713402 | mekorot.***** | 1937 | $1,464,449,227 | 1,983 | N/A | N/A | 520010869 |
| 32 | Niuchang Branch Of Fuquan Water Supply And Drainage CO., LTD | China | Qiannan Buyi and Miao Autonomo | Baozi, Niu Field, Fuquan | Guizhou | 558000 | N/A | 2006 | $1,386,990,000 | 8 | N/A | N/A | 522724000073594 |
| 33 | Pennon Group PLC | Unitedkingdom | Newport Park | Peninsula House | Devon | EX2 7HR | pennon-group.***** | 1989 | $1,325,451,283 | 3,910 | N/A | N/A | 02366640 |
| 34 | Companhia De Saneamento De Minas Gerais Copasa MG | Brazil | Belo Horizonte | Rua Mar de Espanha 525 | Minas Gerais | 30330-270 | copasa.***** | 1963 | $1,324,990,242 | 11,260 | N/A | N/A | 17281106000103 |
| 35 | Northumbrian Water LIMITED | Unitedkingdom | Durham | Northumbria House | Durham | DH1 5FJ | kielderwatersite.***** | 1989 | $1,286,742,742 | 3,505 | N/A | N/A | 02366703 |
| 36 | Southern Water Services LIMITED | Unitedkingdom | High Salvington | Southern House | West Sussex | BN13 3NX | southernwater.***** | 1989 | $1,255,750,610 | 2,741 | N/A | N/A | 02366670 |
| 37 | Chengdu Xingrong Environment CO., LTD. | China | Chengdu | No.1000, Jincheng Blvd., Wuhou District | Sichuan | 610041 | N/A | 1996 | $1,248,870,287 | 5,325 | N/A | N/A | 620000000016003 |
| 38 | Shaanxi Water Development Group Co.,ltd. | China | Xi'An | Floors 4-7, 2021 Chanba Avenue, Weiyang District | Shaanxi | 710018 | N/A | 2023 | $1,212,032,446 | 190 | N/A | N/A | 610000100629752 |
| 39 | 130 Regional Water Sypply CORPORATION | USA | Phoenix | 2355 W Pinnacle Peak Rd Ste 300 | Maricopa | 85027 | N/A | 2018 | $1,204,248,214 | 1 | N/A | N/A | 813220497 |
| 40 | Water Supplies Department | Hongkong | Wan Chai District | 48/f Immigration Twr | Eastern District | N/A | wsd.***** | 1902 | $1,197,269,858 | 4,639 | N/A | N/A | N/A |
| 41 | Companhia De Saneamento Do Parana Sanepar | Brazil | Curitiba | Rua Engenheiros Reboucas 1376 | Paraná | 80215-100 | site.***** | 1968 | $1,165,334,034 | 6,281 | N/A | N/A | 76484013000145 |
| 42 | Glas Cymru Holdings Cyfyngedig | Unitedkingdom | Saint Mellons | Linea | Cardiff | CF3 0LT | N/A | 2015 | $1,163,153,708 | 4,047 | N/A | N/A | 09917809 |
| 43 | Dwr Cymru Cyfyngedig | Unitedkingdom | Saint Mellons | Linea, Fortran Road | Cardiff | CF3 0LT | dwrcymru.***** | 1989 | $1,158,346,765 | 4,047 | N/A | N/A | 02366777 |
| 44 | Glas Cymru Anghyfyngedig | Unitedkingdom | Nelson | Pentwyn Road | Caerphilly | CF46 6LY | dwrcymru.***** | 2001 | $1,158,346,765 | 4,047 | N/A | N/A | 03975719 |
| 45 | Jiangxi Hongcheng Environment Co.,ltd. | China | Nanchang | No. 1289 Lvyin Road, Honggutan District | Jiangxi | 330038 | N/A | 2001 | $1,135,426,800 | 6,837 | N/A | N/A | 360000110007679 |
| 46 | Fuquan City Water Supply And Drainage CO., LTD. Jinshan Branch | China | Fuquan | Jinshan Office Construction Road | Guizhou | 550500 | N/A | 2006 | $1,118,600,000 | 19 | N/A | N/A | 522724000073609 |
| 47 | Taiwan Water CORPORATION | Taiwan | North District | No. 2-1, Shuangshi Rd., Sec. 2, | Taichung City | 404403 | N/A | 1973 | $1,112,927,630 | 5,717 | N/A | N/A | 52242444 |
| 48 | China Water Investment Co.,ltd. | China | Beijing | 701,702, No.16, 2, Baiguang Road, Xicheng District | Beijing | 100053 | N/A | 1985 | $1,108,741,489 | 106 | N/A | N/A | 100000000003932 |
| 49 | Melbourne Water CORPORATION | Australia | Melbourne | 990 la Trobe St | Victoria | 3008 | melbournewater.***** | 1890 | $1,086,978,169 | 1,114 | N/A | N/A | 81945386953 |
| 50 | Companhia Riograndense De Saneamento Corsan | Brazil | Porto Alegre | Rua Caldas Junior 120 | Rio Grande Do Sul | 90010-260 | corsan.***** | 1966 | $1,081,716,844 | 5,516 | N/A | N/A | 92802784000190 |