12 NSE-listed Oil & Gas - PSU companies, a sub-sector of Energy & Power, with a combined free float of ₹2.83 lakh cr. The largest is Oil & Natural Gas Corporation Ltd.. Index membership across the group is concentrated in NIFTY 500 (11), NIFTY ENERGY (8), NIFTY SMALLCAP 250 (7), NIFTY 200 (4), NIFTY INFRA (4).
| Company | Symbol | Sub-sector | Market cap tier | Free float |
|---|---|---|---|---|
| Oil & Natural Gas Corporation Ltd. | ONGC | Oil & Gas - PSU | Large Cap | ₹1.10 lakh cr |
| Indian Oil Corporation Ltd. | IOC | Oil & Gas - PSU | Large Cap | ₹55,000 cr |
| Bharat Petroleum Corporation Ltd. | BPCL | Oil & Gas - PSU | Large Cap | ₹45,000 cr |
| Hindustan Petroleum Corporation Ltd. | HINDPETRO | Oil & Gas - PSU | Large Cap | ₹30,000 cr |
| Indraprastha Gas Ltd. | IGL | Oil & Gas - PSU | Small Cap | ₹15,000 cr |
| Mahanagar Gas Ltd. | MGL | Oil & Gas - PSU | Small Cap | ₹12,000 cr |
| Aegis Logistics Ltd. | AEGISLOG | Oil & Gas - PSU | Small Cap | ₹3,000 cr |
| Aegis Vopak Terminals Ltd. | AEGISVOPAK | Oil & Gas - PSU | Small Cap | ₹3,000 cr |
| Castrol India Ltd. | CASTROLIND | Oil & Gas - PSU | Small Cap | ₹3,000 cr |
| Chennai Petroleum Corporation Ltd. | CHENNPETRO | Oil & Gas - PSU | Small Cap | ₹3,000 cr |
| Mangalore Refinery & Petrochemicals Ltd. | MRPL | Oil & Gas - PSU | Small Cap | ₹3,000 cr |
| Sandur Manganese & Iron Ores Ltd. | SANDUMA | Oil & Gas - PSU | Micro Cap | ₹700 cr |