PGNiG was established in 1982. In 1996, the company was transformed into a joint-stock company. In 2004, it became Sp (Spółka Akcyjna). In 2011, PGNiG purchased 99.8% of Vattenfall Heat Poland's assets. In 2018, PGNiG signed a contract with Cheniere Marketing International. In 2021, PGNiG was ranked No58 in the Arctic Environmental Responsibility Index (AERI).