Factorial Energy Inc. began trading on the Nasdaq Stock Market under ticker symbols "FAC" and "FACWW" on June 8, 2026, following completion of its business combination with Cartesian Growth Corporation III, a special purpose acquisition company.

The transaction values the solid-state battery developer at approximately $1.3 billion and provides more than $100 million in gross proceeds to support commercialization efforts across defense, aerospace, hyperscale data centers, and electric mobility applications.

Boston-based Factorial develops solid-state battery technology and has secured partnerships with automotive manufacturers including Mercedes-Benz, Stellantis, Hyundai, and Kia. The company received strategic investment from In-Q-Tel, the investment arm of the U.S. national security community.

"We built Factorial to solve one of the hardest problems in energy – making solid-state real at scale," said Siyu Huang, CEO of Factorial. "The automotive industry is the most demanding proving ground in the world, and we've shown our technology can perform in real cars on real roads."

Recent developments include partnerships with drone integrators across three continents and announcement of what the company describes as the first solid-state battery production program in the U.S. for passenger vehicles through collaboration with Karma Automotive. Mercedes-Benz completed testing of Factorial's FEST cells in a modified EQS vehicle, achieving a 1,205 kilometer journey on a single charge.

Factorial plans to ring the Nasdaq Opening Bell on June 17, 2026, and will display demonstration vehicles and battery cells outside the exchange building from 10:00 a.m. to 11:30 a.m. ET.

The company's board includes Executive Chairman Joe Taylor, former Chairman and CEO of Panasonic North America, and Dieter Zetsche, former Chairman of Daimler and Head of Mercedes-Benz Cars.