U.S.-based solid-state battery developer Factorial Energy has officially entered the public markets, marking a major milestone in its efforts to commercialize next-generation battery technology for electric vehicles and other high-growth industries.
The company announced the completion of its previously disclosed business combination with Cartesian Growth Corporation III, a special purpose acquisition company (SPAC). Following the transaction, Factorial began trading on the Nasdaq under the ticker symbols FAC and FACWW.
The deal values Factorial at approximately $1.3 billion and is expected to provide more than $100 million in gross proceeds to support the commercialization of its solid-state battery platform across e-mobility, defense and aerospace applications, hyperscale data centers, robotics, and advanced energy systems.
Solid-State Batteries Move Closer to Commercial Reality
Factorial has emerged as one of the leading companies in the race to bring solid-state batteries from the laboratory to large-scale production. Unlike many battery startups, the company has already demonstrated its technology in real-world vehicle testing through partnerships with several major automakers.
One of its most notable achievements came when Mercedes-Benz integrated Factorial’s FEST® solid-state battery cells into a modified EQS test vehicle. The prototype completed a journey of approximately 1,205 km (749 miles) on a single charge, showcasing the potential of solid-state batteries to dramatically increase driving range.
According to Mercedes-Benz, the solid-state battery delivered roughly 25% more usable energy while maintaining a similar size and weight compared with the standard battery pack used in the EQS.
Mercedes-Benz technology chief Markus Schäfer previously described the technology as a potential “gamechanger” for future electric vehicles.
Strong Automotive Partnerships
Factorial has built an impressive roster of automotive partners, including Mercedes-Benz, Hyundai Motor Group, Kia, Stellantis, and Karma Automotive.
Earlier this year, the company and Karma Automotive announced what they described as the first U.S. solid-state battery production program for passenger vehicles. The initiative is viewed as a significant step toward bringing the technology into commercial automotive production.
The company also reported achieving key development milestones with Stellantis as it moves toward deploying demonstration fleets powered by its battery technology.
Expanding Beyond Electric Vehicles
While automotive applications remain central to Factorial’s strategy, the company is increasingly targeting additional markets where high-energy-density batteries can provide a competitive advantage.
During 2026, Factorial expanded its presence in the drone and robotics sectors through partnerships with KULR Technology Group, Tulip Tech B.V., and JRES. The company has also attracted strategic backing from IQT and supply chain partners including POSCO Future M and Philenergy.
These initiatives reflect Factorial’s broader vision of supplying advanced batteries for electric aviation systems, robotics, defense applications, and next-generation energy storage solutions.
Capital-Light Growth Strategy
Factorial’s commercialization approach differs from many battery startups. Rather than building large-scale manufacturing facilities on its own, the company utilizes a capital-light model centered on joint manufacturing partnerships. This strategy is designed to accelerate deployment while reducing the substantial capital requirements typically associated with battery production.
CEO Siyu Huang said the company was founded to solve one of the most difficult challenges in energy storage: making solid-state batteries commercially viable at scale.
With access to public-market capital and growing validation from automotive and industrial partners, Factorial believes it is well positioned to accelerate the commercialization of solid-state battery technology.
Looking Ahead
Factorial enters its next chapter with a growing list of technical milestones, strategic partnerships, and real-world demonstrations that few battery startups can match. From helping a Mercedes-Benz EQS travel nearly 750 miles on a single charge to launching the first U.S. solid-state battery production program for passenger vehicles, the company has steadily moved closer to commercial deployment.
Now, with its Nasdaq listing complete and fresh capital secured, Factorial is aiming to transform solid-state batteries from a promising technology into a scalable commercial reality across transportation, aerospace, robotics, and energy storage markets.
