Mainspring
Series F in 2025
Mainspring Energy, Inc. is a technology company based in Menlo Park, California, that specializes in developing linear generator technology for low carbon, dispatchable energy solutions. Founded in 2010 by three Stanford engineers, the company focuses on creating advanced prototypes that convert fuel into electricity through a unique, low-temperature reaction of air and fuel. This innovative approach allows Mainspring to offer generators that provide affordable, reliable electricity while significantly reducing carbon emissions compared to traditional electric grids. The company's mission is to address climate change and enhance energy accessibility, contributing to the development of net-zero carbon energy systems for the future.
ElectronX
Seed Round in 2024
ElectronX develops an energy exchange platform designed to stabilize short-term electricity pricing. It offers centrally cleared power derivatives, enabling utilities, traders, and independent power producers to effectively manage intraday price risks.
Fourth Power
Series A in 2023
Fourth Power specializes in utility-scale thermal battery storage solutions. It converts renewable energy into a reliable on-demand power source, addressing grid needs while facilitating the transition to decarbonized infrastructure.
Verdigris Technologies
Venture Round in 2023
Verdigris Technologies develops software solutions for real-time electricity monitoring in commercial facilities. Its key product, Verdigris Energy Tracker, identifies operational inefficiencies, automates building management, predicts and reduces peak demand, and detects equipment failures. The system uses wireless hardware to send device-level consumption data to the cloud, enabling smarter facility operations, energy efficiency, and property management.
Verdigris Technologies
Series A in 2016
Verdigris Technologies develops software solutions for real-time electricity monitoring in commercial facilities. Its key product, Verdigris Energy Tracker, identifies operational inefficiencies, automates building management, predicts and reduces peak demand, and detects equipment failures. The system uses wireless hardware to send device-level consumption data to the cloud, enabling smarter facility operations, energy efficiency, and property management.