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Stellantis holds 9.5% stake in solid state battery startup Factorial, filing shows

By Thomson Reuters Jun 19, 2026 | 10:11 AM

MILAN, June 19 (Reuters) – Automaker Stellantis holds a 9.5% stake in U.S. solid-state battery ​startup Factorial Energy and might ‌buy further shares in the future, a SEC filing showed.

Solid-state batteries for electric vehicles are expected to ‌be ​lighter, with better ⁠energy density than, ⁠traditional lithium-ion batteries, and ensuring faster charging times. However manufacturers have so far struggled to ​produce them at scale.

• Stellantis’ overall stake in Factorial is ⁠valued around $126 million ⁠at current stock prices.

• ​Stellantis sees Factorial as an “attractive ​investment opportunity”, the filing showed.

• The ‌Franco Italian automaker first invested in Factorial in 2021, with a €75 million ($86 million) deal.

• Stellantis ⁠said earlier this month it had integrated Factorial’s ‘FEST’ solid-state battery cells into ⁠a development ‌vehicle and launched ⁠a road-testing program to ​verify ‌performance, safety and reliability.

• According ​to ⁠the filing, Stellantis’ Financial Services CEO Jon Nelson has been elected to Factorial’s board.

($1 = 0.8728 euros)

(Reporting by Giulio Piovaccari, editing by ​Gavin Jones)