| # | Company |
| 1 | APCPDCL, Hyderabad |
| 2 | B.E.S. T., Mumbai |
| 3 | Banglore Electricity Supply Company (BESCOM) |
| 4 | Banglore Water Supply & Sewage Board (BWSSB) |
| 5 | BSES Rajdhani Power Ltd, Delhi |
| 6 | BSES Yamuna Power Ltd, Delhi |
| 7 | C.E.S.C. Ltd, Calcutta |
| 8 | Chennai Metropolitan Water Supply & Sewerage Board |
| 9 | Corporation of Chennai |
| 10 | Employees Provident Fund Organisation |
| 11 | HFCL Connect, Chandigarh |
| 12 | Hyderabad Metropolitan Development Authority |
| 13 | Hyderabad Metropolitan Water Supply & Sewerage Board |
| 14 | Hyderabad Urban Development Authority |
| 15 | IT Expressway Ltd. |
| 16 | Mahanagar Gas Ltd, Mumbai |
| 17 | Maharashtra State Electricity Board, Mumbai |
| 18 | Maharashtra State Electricity Board, Pune |
| 19 | Municipal Corporation of Hyderabad |
| 20 | Natraj Gas |
| 21 | Navi Mumbai Municipal Corporation (NMMC) |
| 22 | North Delhi Power Ltd. |
| 23 | Pune Municipal Corporation |
| 24 | Reliance Infrastructure Ltd. |
| 25 | State Transport Employee's Union |
| 26 | Tata Power Co. Ltd. |
| 27 | Torrent Power AEC Ltd. |
