| Special Machinery Manufacturing Company | Khoozestan Water and Soil Company | Khoozestan Water and Power Authority | Omrab Company |
| Shymbar Company | Kherad Engineering Company | Isfahan Water and Wastewater Organization | Ab Structures Company |
| Shefab Company | Kish Water and Power Company | Golestan Water and Wastewater Organization | Iranit Company |
| SAIPA Company | Shahid Abbaspour Dam | Arak Water and Wastewater Organization | Khoozestan Fisheries Company |
| Iran Khodro Diesel Company | Nir Pars Company | Ilam Water Organization | Ahvaz Rolling and Pipe Mill Company |
| Tehran Water and Soil Consulting Engineers Company | Saveh Profile Company | Ardabil Water and Wastewater Organization | Abiran Company |
| National Reconstruction and Development Company of Afghanistan | Sarcheshmeh Copper Comprehensive Water Project | Khoy Water and Wastewater Organization | Khoozestan Steel Company |
| Technozist Company | Maham Parchin Company | Bojnourd Water and Wastewater Organization | Jondi Shapoor Company |
| Sistan and Baluchestan Water and Wastewater Organization | Tabriz Urban Railway Company | Borujerd Water and Wastewater Organization | Iranian Minerals Production and Supply Company (IMPASCO) |
| Qeshm Water and Power Company | Aerospace Industries Organization | Kerman Water and Wastewater Organization | Iritec Company |
| Fooladshahr Water and Power Organization | Namvaran Company | Gilan Water and Wastewater Organization | Ghaem Reza Company |
