List of  Subsidiary Companies associated with Tata Power:

1. Af-Taab Investment Co. Ltd.
2. Chemical Terminal Trombay Ltd.
3. Powerlinks Transmission Ltd.
4. Tata Power Trading Co. Ltd.
5. Maithon Power Ltd.
6. NELCO Ltd.
7. Tatanet Services Ltd.
8. Industrial Energy Ltd.
9. Industrial Power Utility Ltd.
10. Industrial Power Infrastructure Ltd.
11. Coastal Gujarat Power Limited
12. Veltina Holdings Ltd.
13. Tata Power (Mauritius) Ltd.
14. Tata Power (Cyprus) Ltd.
15. Tata Power International Holdings Ltd.
16. North Delhi Power Ltd.
17. Energy Eastern Pte. Ltd.
18. Trust Energy Resources Pte. Ltd.

List of  Associate Companies of Tata Power:

1. Panatone Finvest Ltd.
2. Rujuvalika Investments Ltd.
3. Tata Ceramics Ltd.
4. Tata Projects Ltd.
5. Yashmun Engineers Ltd.
6. Tata BP Solar India Ltd.
7. Vantech Investments Ltd.
8. Nelito Systems Ltd.