Key Takeaways
- Stellantis maintains a 9.5% ownership position in Factorial Energy, a U.S.-based solid-state battery developer, valued at approximately $126 million
- The investment, distributed between Stellantis Europe and Stellantis Ventures, represents about 8.67 million shares
- Laboratory testing revealed Factorial’s battery cells achieve 375 Wh/kg energy density with charging capabilities from 15% to 80% in approximately 18 minutes
- Real-world validation has commenced with Factorial’s FEST cells installed in a prototype Dodge Charger Daytona undergoing road trials
- STLAM shares have plummeted nearly 43% year-to-date in 2026, with a recent 3.7% decline coinciding with BMW’s earnings warning
An SEC filing has revealed that Stellantis controls a 9.5% ownership stake in Factorial Energy, with the position currently valued at approximately $126 million. The investment is distributed across holdings by Stellantis Europe and Stellantis Ventures.
The automotive giant initially invested in Factorial during 2021 through a €75 million ($86 million) commitment. This initial capital injection has since transitioned into a direct equity stake, providing the carmaker with substantial influence in the battery startup’s direction.
Jon Nelson, serving as CEO of Stellantis Financial Services, has secured a board position at Factorial, transforming the relationship from purely financial to strategically operational.
The regulatory disclosure further indicated that Stellantis remains open to expanding its ownership position in Factorial moving forward, characterizing the battery developer as representing an “attractive investment opportunity.”
Factorial has initiated real-world testing of its solid-state battery technology in a development version of the Dodge Charger Daytona. This represents a critical milestone as the cells transition from controlled laboratory settings to actual road conditions.
During controlled laboratory evaluations, Factorial’s battery cells demonstrated energy density reaching 375 Wh/kg. The cells also exhibited charging performance from 15% to 80% capacity in approximately 18 minutes — metrics that, if achievable in mass production, would mark a substantial improvement over existing lithium-ion technology.
Solid-state battery technology offers reduced weight compared to traditional lithium-ion batteries while delivering enhanced range, accelerated charging times, superior safety characteristics, and potentially reduced lifecycle costs. However, the challenge of achieving commercial-scale manufacturing remains the industry’s biggest hurdle.
Stellantis’ Strategic Positioning
For Stellantis, the partnership with Factorial represents a component of its comprehensive strategy to maintain competitiveness in electric vehicle technology development. Solid-state batteries are widely recognized as the next transformative advancement in energy storage, and establishing early partnerships could prove decisive as the technology reaches commercial viability.
The company’s approach prioritizes strategic participation over complete ownership, focusing on maintaining involvement with a startup demonstrating impressive laboratory performance and now advancing toward practical validation.
Share Price Struggles Continue
Despite the promising developments on the technology front with Factorial, Stellantis shares have experienced significant turbulence throughout 2026. STLAM has declined nearly 43% since the beginning of January.
The latest downturn occurred this week, with shares dropping 3.7%. This decline coincided with a profit warning issued by BMW, which triggered broader selling pressure across European automotive stocks.
Stellantis continues to face challenging conditions throughout its primary markets, with the BMW announcement intensifying existing sector-wide headwinds.
The SEC filing documenting the Factorial ownership stake was made public on June 19, 2026.
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