Sono Group is a Dutch-registered holding company that is abandoning its legacy solar technology business and pivoting to a Bitcoin treasury strategy. The company's original operating subsidiary, Sono Motors, developed vehicle-integrated photovoltaic (ViPV) solar solutions — lightweight solar modules integrated into the exterior surfaces of commercial vehicles such as buses, trucks, trailers, and vans — to reduce fuel consumption for fleet operators and OEMs. Customers included Scania, Stadtwerke München, and Koegel Trailer. Sono sold complete solar integration systems, proprietary solar charge controllers, solar modules, and engineering services on a project-by-project basis, but never established a recurring revenue base or reached profitability. In March 2026, Sono's supervisory board terminated all funding to Sono Motors and initiated a wind-down of the solar business. Going forward, Sono's sole strategy is to hold Bitcoin as its primary treasury asset and generate cash flow by selling covered calls against those holdings — a model similar in concept to MicroStrategy. Sono has entered into an ISDA Master Agreement with Blockchain.com to facilitate derivative transactions around its Bitcoin holdings. The company has no operating employees and no product or service revenue; returns depend entirely on Bitcoin price appreciation and option premiums. Sono has accumulated losses of approximately €317M since its founding in 2016, carries a going concern qualification from its auditors, and has a capital structure dominated by preferred shareholder Yorkville, creating significant dilution risk for ordinary shareholders.