| Manufacturer |
| Cement |
| Associated Cement Companies |
| Kalyanpur Cements Limited |
| Mangalam Cement Limited |
| Rajshree Cement |
| Saurashtra Cement Limited |
| Consultants |
| Chemtex Engineering of India Limited |
| Engineers India Limited |
| Jacob H&G. |
| Krupp Industries India Limited |
| Larsen & Toubro Limited |
| Mecon Limited |
| Nicco Corp. Limited |
| Projects Development India Limited |
| Subhash Projects |
| Tata Consulting Engineers |
| Uhde India Limited |
| Chemicals |
| Birla Copper |
| Deepak Fertilizers & Petrochemicals Corporation Limited |
| Diamines & Chemicals Limited |
| Gujarat Alkalis And Chemicals Limited |
| Gujarat Heavy Chemicals Limited |
| Engineering |
| Navin Heat Exchangers Private Limited |
| Metallurgical |
| Kajaria Iron And Casting Limited |
| Mecon (India) Limited |
| M. N. Dastur Limited |
| Petrochemicals |
| Gujarat Refinery |
| Indian Oil Corporation Limited |
| Indian Petrochemical Corporation Limited |
| Reliance Petrochemicals Corporation Limited |
| Southern Petrochemical Corporation Limited |
| Power |
| Gujarat Industrial Power Corporation Limited |
| Kapsales Electricals Limited |
| Steel |
| Bhilai Steel Plant |
| Jindal Vijaynagar Steel Limited |
| Mecon (India) Limited |
| Otoklin Plants And Equipments Limited |
| Vishakapatanam Steel Plant |
| Others |
| National Thermal Power Corporation Limited |
| Nuclear Power Corporation |
| Shree Narmada Khand Udyog |
| Walchandnagar Industries Limited |