Key Takeaways
- The automaker maintains a 9.5% ownership position in Factorial Energy, a U.S.-based solid-state battery developer, currently valued at approximately $126 million
- Ownership is distributed between Stellantis Europe and Stellantis Ventures, representing about 8.67 million shares
- Testing revealed Factorial’s battery cells achieve 375 Wh/kg energy density with charging capability from 15% to 80% in approximately 18 minutes
- A prototype Dodge Charger Daytona equipped with Factorial’s FEST technology has entered real-world road testing phase
- Shares of STLAM have plummeted nearly 43% year-to-date in 2026, with a recent 3.7% decline following BMW’s earnings warning
An SEC disclosure has revealed that Stellantis maintains a 9.5% ownership position in Factorial Energy, with the investment currently worth approximately $126 million based on prevailing market valuations. The position is divided between holdings by Stellantis Europe and Stellantis Ventures.
The automotive giant initially committed to Factorial in 2021 through a €75 million ($86 million) investment round. This capital injection has now been transformed into a direct equity position, providing Stellantis with substantial influence in the battery startup’s strategic direction.
Jon Nelson, who serves as CEO of Stellantis Financial Services, has secured a board seat at Factorial, transforming what began as a capital deployment into a more hands-on strategic partnership.
The regulatory filing additionally indicated that the automaker is considering expanding its ownership stake in Factorial going forward, characterizing the battery developer as presenting a “compelling investment opportunity.”
Factorial has recently transitioned its solid-state battery technology from controlled laboratory settings to on-road validation, installing its cells in a development version of the Dodge Charger Daytona. This represents a critical milestone, as the batteries are now being evaluated under actual driving conditions.
During controlled laboratory evaluations, Factorial’s battery cells demonstrated an energy density reaching 375 Wh/kg. Additionally, the cells achieved rapid charging performance, moving from 15% to 80% capacity in around 18 minutes — metrics that would constitute a significant advancement over today’s lithium-ion technology if achievable in mass production.
Solid-state battery architecture offers reduced weight compared to traditional lithium-ion configurations while delivering enhanced range, accelerated charging times, superior safety characteristics, and potentially reduced costs over the product lifecycle. However, the fundamental challenge remains manufacturing scalability, which the industry has not yet successfully resolved.
Strategic Rationale Behind Stellantis Investment
For Stellantis, the partnership with Factorial represents one element of a comprehensive strategy to establish competitive positioning in next-generation electric vehicle technology. Industry observers widely view solid-state batteries as the next transformative breakthrough, and early-stage partnerships could prove strategically valuable as the technology reaches commercial viability.
The company’s approach emphasizes securing strategic access rather than complete ownership, allowing it to maintain involvement with a developer already demonstrating promising laboratory performance while now progressing toward practical implementation.
Share Price Challenges Continue
Despite positive developments on the technology front with Factorial, Stellantis shares have experienced significant headwinds throughout 2026. STLAM has declined nearly 43% since the beginning of January.
The latest downward movement occurred this week, with shares falling 3.7%. This decline coincided with a profit warning issued by BMW, which triggered broader weakness across European automotive stocks.
Stellantis continues to face challenging market dynamics across its primary geographic markets, with the BMW announcement amplifying existing sector-wide pressures.
The SEC filing documenting the Factorial equity position was made public on June 19, 2026.
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