Automotive giant Stellantis has disclosed that it holds a 9.5% stake in U.S.-based solid-state battery developer Factorial Energy, according to a recent filing with the U.S. Securities and Exchange Commission (SEC). The filing also indicates that Stellantis may increase its investment in the battery startup in the future as it continues to strengthen its position in next-generation electric vehicle technologies.
Based on current valuations, Stellantis’ stake in Factorial Energy is estimated to be worth approximately US$126 million. The automaker described the company as an attractive investment opportunity, reflecting its confidence in the potential of solid-state battery technology to transform the electric vehicle industry.
Solid-state batteries are widely regarded as one of the most promising advancements in EV energy storage. Compared with conventional lithium-ion batteries, they are expected to offer higher energy density, reduced weight, improved safety, and significantly faster charging capabilities. These advantages could help automakers improve vehicle range and performance while reducing charging times for consumers.
Despite their potential, commercializing solid-state batteries at scale remains a significant challenge for the industry. Manufacturers continue to work on overcoming technical and production hurdles before the technology can be deployed in mass-market electric vehicles.
Stellantis first invested in Factorial Energy in 2021 through a €75 million (approximately US$86 million) investment agreement. Since then, the companies have expanded their collaboration on the development and validation of advanced battery technologies.
Earlier this month, Stellantis announced that it had successfully integrated Factorial Energy’s FEST (Factorial Electrolyte System Technology) solid-state battery cells into a development vehicle. The automaker also launched a road-testing programme aimed at evaluating the batteries’ performance, reliability, durability, and safety under real-world operating conditions.
The SEC filing further revealed that Jon Nelson, Chief Executive Officer of Stellantis Financial Services, has been elected to Factorial Energy’s board of directors. The appointment is expected to strengthen strategic alignment between the two companies as they continue to advance solid-state battery development.
The investment underscores Stellantis’ long-term commitment to electrification and highlights growing industry interest in next-generation battery technologies that could play a critical role in the future of electric mobility.
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