Fortistar

Fortistar, based in White Plains, New York, is a private investment and energy asset management firm founded in 1993. The firm focuses on opportunities in the energy, transportation, and industrial sectors, with a particular emphasis on lower carbon energy generation. Fortistar owns and operates various facilities across the United States and Canada, including cogeneration plants, compressed natural gas fueling stations, landfill power plants, and biomass facilities. Additionally, the firm is involved in projects aimed at reducing carbon emissions in industrial operations, supporting the transition to a low carbon economy through its diverse portfolio of energy assets.

Mark Comora

Founder, CEO and President

Nadeem Nisar

Managing Director

11 past transactions

Nanoramic Laboratories

Venture Round in 2024
Founded in 2008, Nanoramic Laboratories specializes in developing and manufacturing advanced energy storage solutions. The company designs, manufactures, and licenses Neocarbonix electrodes for rechargeable Li-ion batteries, FastCAP ultracapacitors, and Thermexit thermal interface gap filler pads. Its products are designed to operate under extreme conditions, with applications in electric vehicles, consumer electronics, and industrial sectors.

Vestaron Corporation

Series C in 2022
Vestaron develops and manufactures peptide-based biologic crop protection products. Its offerings include Spear-T for thrips control in greenhouses, Spear-Lep for fruits and vegetables, and Leprotec for field use. Headquartered in Durham, North Carolina with a research center in Kalamazoo, Michigan, Vestaron aims to provide growers with effective, safe, and sustainable biopesticides.

Vestaron Corporation

Series C in 2022
Vestaron develops and manufactures peptide-based biologic crop protection products. Its offerings include Spear-T for thrips control in greenhouses, Spear-Lep for fruits and vegetables, and Leprotec for field use. Headquartered in Durham, North Carolina with a research center in Kalamazoo, Michigan, Vestaron aims to provide growers with effective, safe, and sustainable biopesticides.

Titan Advanced Energy Solutions

Series B in 2021
Titan Advanced Energy Solutions, Inc. is a developer of advanced battery management systems specifically for lithium-ion batteries. Founded in 2016 and based in Somerville, Massachusetts, the company utilizes patented ultrasound technology to enhance battery performance, achieving over 99% accuracy in state of health and state of charge assessments. This technology offers substantial benefits, including a minimum 20% increase in charge capacity and a 125% extension in battery life, while also providing real-time monitoring and balancing at the cell level. Titan's solutions cater to various industries, including electric vehicles, stationary energy storage, mobile devices, and battery manufacturing. Their ionView technology is competitively priced compared to traditional systems, delivering significant advantages to manufacturers, integrators, and end-users in the automotive and consumer markets, thereby contributing to the electrification and decarbonization efforts for a sustainable future.

Skyryse

Series B in 2021
Skyryse develops FlightOS, a hardware and software operating system that enables safer, more capable, and accessible flight across various aircraft types. Founded in 2016, the company is headquartered in Los Angeles, California.

Nanoramic Laboratories

Venture Round in 2021
Founded in 2008, Nanoramic Laboratories specializes in developing and manufacturing advanced energy storage solutions. The company designs, manufactures, and licenses Neocarbonix electrodes for rechargeable Li-ion batteries, FastCAP ultracapacitors, and Thermexit thermal interface gap filler pads. Its products are designed to operate under extreme conditions, with applications in electric vehicles, consumer electronics, and industrial sectors.

Ambri

Venture Round in 2021
Ambri develops grid-scale energy storage technology based on liquid metal battery cells, designed to provide low-cost, long-duration storage for electric grids and renewable energy systems. Its systems are offered as ready-to-install DC containers that enable daily cycling with high efficiency, long lifespan, and safety, and are positioned to replace diesel generators at hyperscale data centers while stabilizing the grid with intermittent renewables. Founded in 2010 and based in Marlborough, Massachusetts, Ambri focuses on scalable storage solutions for grid reliability, renewable integration, and data-center applications.

Breakthrough Technologies

Private Equity Round in 2021
Breakthrough Technologies is a manufacturer of innovative industrial products focused on enhancing water and energy sustainability. The company develops solutions that aim to reduce the use of water treatment chemicals, minimize blowdown, and lower operating costs for various industries. By promoting chemical-less processes and recovering water loss, Breakthrough Technologies supports businesses in achieving cleaner and more cost-effective operations while driving improved environmental performance. Their approach not only addresses industry challenges but also fosters a shift towards sustainable practices in water and energy management.

Pellucere Technologies

Venture Round in 2021
Founded in 2009, Pellucere Technologies develops and manufactures advanced optical coatings for energy and industrial applications. Its flagship product is MoreSun, a solar anti-reflective coating with an integrated silica shield to enhance light capture and reduce soiling. The company serves utility-scale solar projects globally, enabling modules to capture more sunlight and improve performance.

BayoTech

Series C in 2021
BayoTech is a company that develops and manufactures hydrogen generation systems, reformers, and steam methane reformers for agriculture, fuel cells, and the energy sector. Founded in 2015 and headquartered in Albuquerque, New Mexico, it focuses on low‑carbon hydrogen solutions that reduce transportation emissions and streamline supply chains through local production. The firm operates hydrogen hubs, including a site in Wentzville, Missouri, and a planned hub in Stockton, California, and builds high‑capacity, high‑pressure transport trailers at its Tulsa, Oklahoma facility. BayoTech offers a complete portfolio of hydrogen production, transport, storage, and fueling services, enabling clients to deploy reliable, cost‑effective, low‑carbon hydrogen fuel.

Castleton Power

Acquisition in 2016
Castleton Power a 72 megawatt (MW) gas-fired combined cycle power plant located in Castleton-on-Hudson, NY. The company was formerly known as EPCOR Power (Castleton) LLC and changed its name to Castleton Power, LLC.
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