Four of the top public sector companies of the country's Hydrocarbon Sector viz. Bharat Petroleum Corporation Limited (BPCL), GAIL (India) Limited (GAIL), Indian Oil Corporation Limited (IOCL), Oil and Natural Gas Corporation Limited (ONGC) have invested in Petronet LNG. Each has a 12.5% equity share, leading to a total of 50% for the four. The balance equity (50%) is held by the public.

As per Articles of Association of the company, at any given point of time, not more than fifty percent (50%) of the company's share capital shall be held, whether directly or indirectly, by the Government, including any Government Company and Public Sector Undertaking.