Fortistar is a privately owned investment firm headquartered in New York City with operations in White Plains. Since its founding in 1993, the firm has deployed more than $3.5 billion across over 14 portfolio companies and manages upwards of 100 facilities. Fortistar works hands-on with its partners, providing both capital and operational guidance to address complex sustainability challenges while generating value for investors and local communities.
Investment activity centers on three sectors: energy, transportation and industrials. The firm seeks out companies that advance decarbonization, improve efficiency and offer scalable solutions. By combining financial support with governance and technical expertise, Fortistar aims to foster growth and long-term performance. This approach balances economic returns with measurable environmental benefits, reflecting a commitment to responsible stewardship.
In energy storage, Fortistar has invested in liquid metal batteries, advanced materials and diagnostic tools. It joined a $144 million financing for Ambri, which develops long-duration grid storage systems, and participated in a $44 million round for Nanoramic, known for advanced energy storage materials. A Series B investment in Titan Advanced Energy Solutions supports ultrasound-based battery management to enhance safety and repurposing of lithium-ion cells. These projects underscore the firm’s drive to support lower-carbon infrastructure.
