Lehto Group Oyj operates as a Finnish company focused on energy construction, particularly electricity storage project development and operations. The company develops, constructs and operates electricity storage facilities for reserve and wholesale electricity markets as well as property-specific energy solutions; it holds non-current assets including factory buildings, machinery from subsidiary Lehto Components Oy, shares in real estate companies and electricity storage components. Lehto Group maintains factories in Finland for component production supporting its energy projects and previously provided construction services encompassing housing, business premises, social care facilities and educational buildings using modular wood and concrete methods; it also offered renovation services including pipeline work. Founded in 2008 and headquartered in Kempele, Finland, the company conducts all operations domestically and targets electricity grid operators, wholesale markets and property owners. In recent developments, Lehto underwent a major restructuring program confirmed by the District Court of Oulu in 2024, involving subsidiary bankruptcies such as Lehto Asunnot Oy, Lehto Tilat Oy and Lehto Korjausrakentaminen Oy, asset sales including Lehto Components assets for EUR 0.3 million, a EUR 15 million convertible bond conversion into 75 million shares in January 2025 increasing CEO Hannu Lehto's stake above 51 percent before adjustment to 49.96 percent, a partnership with Desay Battery announced in May 2025 for Nordic energy storage frequency regulation projects totaling 200MWh capacity, and advancement of electricity storage initiatives with two facilities operational, five under construction at 2.2MW and 12 in development at 55MW as of June 2025. The company reports negative equity of EUR 0.7 million and net sales of EUR 0.4 million for January-June 2025 from rental income, electricity markets and inventory sales, while planning venue transfer to Nasdaq First North Growth Market in early 2026.