Steady Energy, developer of small modular nuclear reactor technology, listed on Nasdaq First North Finland
Trading in Steady Energy’s shares commenced on Nasdaq Helsinki’s First North marketplace on 2 October 2026. Tesi, as an anchor investor, has an ownership stake of approximately 9%.
Steady Energy was founded in 2023 as a spin-off from a VTT research project. Today, it is one of the world’s few small modular reactor technology companies focused on district heating. Steady Energy’s LDR-50 reactor is designed to provide cities and energy companies with a reliable, scalable and low-carbon alternative to combustion-based heat production.
Tesi’s involvement strengthens domestic ownership and the company’s financing base as it moves towards its first technology delivery agreements. Tesi made its initial investment in Steady Energy in 2025.
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Additional information:
Samppa Sirviö, Investment Manager, Venture & Growth Investments
samppa.sirvio@tesi.fi
+358 50 518 6063
Tesi (officially Finnish Industry Investment) is a state-owned, market-driven investment company that invests in venture capital and private equity funds and directly in Finnish startups and growth companies, and to new industrial scale businesses. tesi.fi | X (Twitter) | LinkedIn | Instagram | Bluesky | Threads | Newsletter