Factorial Energy Inc. shares fell 20.69% to $17.40 on Thursday, underperforming the broader market after the company announced a technological milestone with Stellantis NV. The decline occurred despite Factorial integrating its FEST solid-state battery technology into a Dodge Charger Daytona development vehicle. This integration marks the first automotive application of the technology in North America and the first use of Factorial's cells in a Stellantis vehicle.

The road-testing program aims to validate the battery's performance, safety, and reliability under real-world conditions. The battery pack utilizes a patented mechanical architecture designed by Stellantis to accommodate solid-state cells, with adaptations to control systems for automotive safety and durability standards. Factorial stated its FEST cells have demonstrated an energy density of 375 Wh/kg, charging from 15% to 90% in 18 minutes, and reliability from -30°C to 45°C.

Nasdaq Debut and Funding

Factorial recently debuted on Nasdaq on June 8 following the completion of its business combination with Cartesian Growth Corporation III. The transaction implied an equity value of about $1.3 billion and raised gross proceeds of more than $100 million to support commercialization efforts.

Strategic Partnerships and Targets

The Boston-based company is targeting sectors including electric vehicles, defense, aerospace, hyperscale data centers, drones, robotics, and e-mobility. Its automotive partnerships include Mercedes-Benz, Stellantis, Hyundai, and Kia. Additionally, Factorial has secured a strategic investment from In-Q-Tel and partnered with drone integrators across three continents.

Factorial Energy Inc. began trading on the Nasdaq Stock Market on June 8, 2026, following the completion of a business combination with Cartesian Growth Corporation III. The transaction implies an equity value of approximately $1.3 billion and provides more than $100 million in gross proceeds to support the commercialization of next-generation batteries for defense, aerospace, hyperscale data centers, and e-mobility. The combined company operates as Factorial Energy Inc., with its Series A common stock and warrants trading under the ticker symbols "FAC" and "FACWW", respectively. Cantor Fitzgerald served as exclusive financial advisor and sole placement agent for the PIPE.

Factorial enters the public market with a capital-light commercialization model built on joint manufacturing partnerships. The company cites support from the U.S. national security investment community, real-world vehicle integrations, and progress toward the first U.S. solid-state production program for passenger vehicles. The listing provides a platform to accelerate the deployment of solid-state technology across drones, robotics, and energy systems. At the time of publication, Factorial shares are trading 27.54% higher at $17.50.

Strategic Milestones and Partnerships

Factorial has established several key partnerships and achieved technological milestones in recent years. These collaborations span multiple continents and sectors, focusing on advancing battery integration for electric aviation and robotics.

Leadership and Future Outlook

Siyu Huang, CEO of Factorial, emphasized the company's focus on solving energy challenges at scale, noting that the technology has been proven in real-world automotive conditions. Peter Yu, Chairman & CEO of Cartesian Growth Corporation III, highlighted the creation of long-term shareholder value and the opening of the company's capital table to investors. The management team includes Executive Chairman Joe Taylor, former Chairman and CEO of Panasonic North America, and Dieter Zetsche, former Chairman of the Board of Daimler.

To commemorate the listing, Factorial rang the Nasdaq Opening Bell on June 17, 2026. The company continues to develop its proprietary FEST® and Solstice™ platforms, which are engineered for scalable manufacturing and designed to deliver performance across defense, space, and energy storage applications.