What are the top PSU companies in India?

Here are some of the top PSU companies in India:

1. Oil and Natural Gas Corporation (ONGC)
2. Bharat Petroleum Corporation Limited (BPCL)
3. Indian Oil Corporation Limited (IOCL)
4. Coal India Limited (CIL)
5. National Thermal Power Corporation Limited (NTPC)
6. Steel Authority of India Limited (SAIL)
7. Bharat Heavy Electricals Limited (BHEL)
8. Gas Authority of India Limited (GAIL)
9. Hindustan Petroleum Corporation Limited (HPCL)
10. Power Grid Corporation of India Limited (PGCIL)

These PSU companies operate in various sectors such as oil and gas, power, steel, mining, and engineering, among others. They are considered some of the top PSU companies in India based on their revenue, market share, and overall performance.