• Steel Authority of India Ltd. - SAIL
• Mittal Steels Ltd.
• ESSAR Steel Ltd.
• Tata Steel Ltd.
• Jindal Steel Ltd.
• Rexon Steel Ltd.
• Bhushan Steel Ltd.
• Vizag steel plant
• Steel Authority of India (Raw material division)
  
  and many more...

PORTS

• Chennai Port Trust (Chennai)
• Mormugao Port Trust (Goa)
• Kolkata Port Trust (Kolkata)
• Adani Port Ltd. (Gujarat)
• Mumbai Port Trust (Mumbai)
• Haldia Port trust(kolkata)
• Vizag Port trust
• Paradip port trust
  
  and many more...

ALUMINIUM

• Jindal Aluminium Ltd. (India)
• Bharat Aluminium Company Ltd. (BALCO) India
• National Aluminium Company Ltd. (NALCO) India
• Hindustan Aluminium Company Ltd. (Hindalco) India
  
  and many more...

CEMENT

• Ultra Tech Ltd.
• Madras Cement Ltd.
• India Cement Ltd.
• Manglam Cement Ltd.
• DSCL Ltd.
• ACC Ltd.
• Ambuja Cement Ltd.
• Lafarge (India) Ltd.
• Jaypee Cement Ltd.
• Birla Cement Ltd.
  
  and many more...

COAL

• Central Coal Fields Ltd.
• Mahanadi Coal Fields Ltd.
• South Eastern Coal Fields Ltd.
• Northern Coal Fields Ltd.
• North Eastern Coal Fields Ltd.
• Bharat Coking Coal Ltd.
• Gujarat NRE Coke Ltd.
  
  and many more...

SUPER THERMAL POWER STATION / THERMAL PLANT

• NTPC Ltd. and all its thermal power stations
• Maharashtra Power Generation Corporation Ltd. (Formerly MSEB)
• Andhra Pradesh Power Generation Corporation Ltd. (Formerly APSEB)
• MAdhya Pradesh Power Generation Corporation Ltd. (Formerly MPSEB)
• Rajasthan Rajya Vidyut Utpadan Nigam Ltd. (Formerly RSEB)
• Chattisgarh State Electricity Board
• LIGNITE MINING SECTOR
• NLC - Neyville Lignite Corporation Ltd.
• Gujarat Mineral Development Corporation Ltd. (GMDC)
  
  and many more...

MANGANESE MINES

• Manganese ORE India Ltd.
• Malanjkhand Copper Project
• Hindustan Copper Ltd.
• Birla Copper Ltd.
  
  and many more...

COPPER AND ZINC

• Hindustan copper ltd
• Hindustan Zinc ltd
• Sterlite Industries ltd
  
  and many more...