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. n September 2025 St1 announced that St1 Suomi Oy will merge its subsidiary, Lämpöpuisto Oy.
Retail station network
St1’s retail network offers marketplaces with fuels, growing number of EV charging and biogas filling points for heavy-duty transport and car wash, alongside stand-alone convenience stores and restaurants.
St1 has previously operated both St1- and Shell-branded networks under a long-term licence agreement. With the current license agreement period coming to an end, St1 has fully transitioned to its own brand. The rebranding of the station network started in April 2025. 2025. By December 2025, more than 170 Shell-branded stations in Finland have been converted into St1 stations, creating a nationwide network of around 470 sites. At the same time, the company has unified its service offering and expanded both its EV charging and heavy-duty biogas networks.
St1 has strong market positions in all Nordic countries. In 2024 the company’s market share was 23.4% in petrol and 19.5% in diesel in Finland.
Fuels
The main source of petrol and diesel sold in St1’s retail station network is the St1 refinery in Gothenburg, Sweden. The goal of St1 is to reduce fossil CO2 emissions in traffic step-by-step by bringing high-quality fuels with a lower environmental impact into the market.
In 2021 St1 launched on the Finnish market Hydrotreated Vegetable Oil diesel. Renewable HVO diesel reduces greenhouse gas emissions by as much as 90% compared to fossil diesel. St1 has also developed and introduced waste-based RE85 high-blend ethanol fuel in Finland.
St1 is building liquefied biogas (LBG) refueling station network for heavy transport around Finland. LBG is a renewable fuel that can be produced e.g. from the manure and other agricultural by-products of cattle farms – as St1 is planning to do in Finland in cooperation with food company Valio.
See also
- Energy in Finland
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