Fortistar Sustainable Solutions Corp. (FSSIW) operates as a provider of sustainable energy and environmental solutions, focusing on renewable energy development, waste-to-energy technologies, and carbon management services. The company offers a portfolio of core products and services including biomass and landfill gas-to-energy facilities; renewable natural gas production and distribution; sustainable fuels such as renewable diesel and sustainable aviation fuel; and engineering, procurement, and construction services for energy infrastructure projects. It serves industrial, municipal, and commercial customers across North America, with operations centered in the United States and expansion into Canada. Founded in 2023 and headquartered in Stamford, Connecticut, Fortistar Sustainable Solutions Corp. emphasizes circular economy principles through its integrated platform that converts waste streams into clean energy. In recent developments, the company completed a strategic merger with Clean Energy Ventures in late 2024, enhancing its renewable natural gas pipeline and forming key partnerships with agricultural cooperatives for feedstock supply. Additionally, it launched a new line of carbon capture and sequestration services in early 2025, alongside securing a $150 million funding round led by institutional investors to accelerate project deployments in the Midwest and Southeast regions.