1)Neyveli Lignite Corporation (NLC), Chennai

2)Bharat Heavy Electrical Limited (BHEL), Trichy

3) Tamil Nadu Cement Corporation Limited (TANCEM)

4) Tamil Nadu Magnesite Limited (TANMAG)

5) Tamil Nadu Industrial Explosives Limited (TEL)

6) Tamil Nadu Minerals Limited (TAMIN)

7) Tamil Nadu Small Industries Corporation Limited (TANSI)

8) Indian Rare Earths Limited (R&S)

9) Bharat Coking Coal Limited (R&S)

10) Central Coal Fields Limited (R&S)

11) Central Mine Planning and Design Institute (R&S)

12) Coal India Limited (R&S)

13) Eastern Coal Fields Limited (R&S)

14) Mahanadhi Coal Fields Limited (R&S)

15) Neyveli Lignite Corporation Limited (R&S)

16) Northern Coal Fields Limited (R&S)

17) South Eastern Coal Fields Limited (R&S)

18) Western Coal Fields Limited (R&S)

19) Bharat Gold Mines Limited (R&S)

20) Hindustan Copper Limited (R&S)

21) Hindustan Zinc Limited (R&S)

22) Mineral Exploration Corporation Limited (R&S)

23) National Aluminium Company Limited (R&S)

24) Bharat Earth Movers Limited (R&S)

25) Industrial Investment Bank of India Limited (R&S)

26) Bharat Brakes and Valves Limited (R&S)

27) Bharat Pumps and Compressors Limited

28) Cement Corporation of India (R&S)

29) HMT Machine Tools Limited (R&S)

30) Mining & Allied Machinery Corporation Limited (R&S)

31) Tannery and Footwear Corporation of India Limited

32) Tyre Corporation of India Limited (R&S)

33) National Research Development Corporation of India Limited (R)

34) National Mineral Development Corporation Limited (R&S)