The capacity of the Guru Gobind Singh refinery is being doubled from the originally planned 9,000 million metric tonne (MMT) to 18,000 MMT per year of crude oil to expand the refinery into petro-chemical center.

HPCL-Mittal Energy is owned by Hindustan Petroleum Corporation Limited (HPCL) and Mittal Energy Investment Pte Ltd. Both the companies hold 49% stake each in the firm, while the remaining is owned by financial institutions.