The shares of ESS Tech, Inc. (NYSE: GWH) rose 6.30% in after-hours trading last Friday, closing at $2.53, indicating a discernible rise in investor interest in the firm. This growing trend was followed by the company’s inclusion on two prestigious industry lists: Fortune’s Most Innovative Companies in America 2025 and TIME’s Top GreenTech Companies in America 2025.
Recognition of Sustainability and Innovation
These accolades demonstrate ESS Tech’s growing stature as a pioneer in green technologies and long-duration energy storage. The company’s well-known, secure, and sustainable iron flow battery technology put it at the forefront of environmentally responsible energy innovation. The recognition from Fortune and TIME demonstrates ESS Tech’s commitment to the study, advancement, and commercialization of its fundamental iron flow technology.
Strengths in R&D and Intellectual Property
ESS Tech’s strong portfolio of intellectual property was a major consideration in its selection for both awards. It has shown a consistent dedication to innovation in the energy industry, as seen by the more than 100 patents it has been issued and the 214 more it has pending. GWH’s cutting-edge storage technology has recently seen advancements in system performance and storage efficiency, as well as a 20% rise in electrolyte energy density.
Energy Base: Meeting Future Demands
ESS Tech’s newly unveiled Energy Base solution represents a major leap forward. Designed with modularity in mind, the system allows customers to scale power and energy capacity independently, making it highly adaptable to specific application requirements.
Utilizing GWH’s 22-hour battery modules, the Energy Base is engineered to deliver gigawatt-scale storage with energy densities surpassing those of lithium-ion alternatives. The technology is aimed particularly at supporting the energy demands of AI data centers and other 24/7 clean energy applications, with deployments anticipated as early as 2027.
Rigorous Selection Processes Validate Excellence
ESS Tech’s inclusion in TIME’s list was the result of extensive data analysis by Statista, evaluating over 4,300 companies on environmental impact, product effectiveness, leadership, and innovation. Similarly, Fortune and Statista assessed firms on product innovation, operational efficiency, and innovation culture to determine America’s Most Innovative Companies for 2025.
