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 №58 in the arctic environmental responsibility index (aeri).