ST1

St1 Suomi Oy is a Finnish energy company and a part of St1 Nordic group that operates in Finland, Sweden, Norway and the United Kingdom. In Finland St1 Suomi Oy has a sister company called St1 Lähienergia Oy, focused on ground source heating solutions. In September 2025 St1 announced that St1 Suomi Oy will merge its subsidiary, Lämpöpuisto Oy. (Wikipedia)