Companies

Indian oil & gas listed majors, their subsidiaries, and joint ventures. 16 entities profiled with shareholding, major projects, operations snapshot, and five-year financials where available.

Downstream OMCs – parents

The three Maharatna fuel-retail majors. IOC alone holds 43.5% of pump share; the three together are 93%.

Upstream E&P

India's crude and gas producers. ONGC is the Maharatna; OIL is Navaratna with a Northeast anchor.

Gas utility

The national gas transmission utility, sponsor of multiple CGD JVs, long-term LNG offtaker.

Private integrated

Reliance operates the world's largest single-site refining complex at Jamnagar.

Listed subsidiaries

Parent-controlled refiners listed separately on NSE / BSE.

Unlisted subsidiaries

Wholly- or majority-owned, not yet listed.

Joint ventures – listed

CGD distributors and the national LNG importer. Owned jointly by the PSU majors.

Joint ventures – unlisted

JVs at the refining and CGD boundary, not separately listed.

Profiles cover shareholding, major projects under construction, operations snapshot (capacity, throughput, customers), and consolidated financials where disclosed. Shareholding is rounded from the last quarterly pattern filed with BSE; cross-check the source file for decision-grade use.