Participated · Series A · Mar 2026

Halcyon builds an AI-driven platform and data subscriptions that let energy professionals search and query regulatory filings, dockets, and energy datasets in natural language and deploy alerts to surface critical developments. Its commercial offerings include the Halcyon Platform and Halcyon Data Subscriptions, which provide continuously updated trackers such as Large Load Tariff, Gas Power Plant, Battery Energy Storage System (BESS), Rate Case/Cost-of-Capital, and New Substation Development. The company targets hyperscalers and digital infrastructure providers, financial services firms, energy developers, and utilities to accelerate decision-making around siting, market entry, and commercial opportunities. Halcyon plans to expand its software capabilities and deepen its proprietary data catalog as it scales to meet growing demand. The company was incorporated in 2023 and is headquartered in San Francisco.

Participated · Series E · Dec 2025

Fervo Energy develops next-generation geothermal power using innovations in horizontal drilling, fiber-optic sensing and advanced reservoir engineering to make geothermal scalable and competitive. Its flagship Cape Station project in Beaver County, Utah is slated to deliver first power to the grid in 2026, reach about 100 MW of operating capacity by early 2027 and has plans to scale to 500 MW. Cape Station is fully contracted through power purchase agreements with Southern California Edison, Shell Energy and community choice aggregators. The company secured long-term non-recourse project financing for the first phase of Cape Station to fund remaining construction costs and meet counterparty credit support requirements. Fervo positions its technology and commercial contracts as enabling Enhanced Geothermal Systems to be treated as a bankable, utility-scale infrastructure asset.

Participated · Equity · Nov 2024

Tokamak Energy develops a squeezed, spherical tokamak for magnetic confinement fusion and also sells high-temperature superconducting magnets through its TE Magnetics division. Its ST40 prototype produced a record-setting 100 million degree C plasma in 2022. The company plans to operate a pilot power plant starting by 2034. To bridge the gap to commercial fusion revenue, Tokamak Energy is expanding TE Magnetics to monetize its magnet expertise. The startup was spun out from the UK Atomic Energy Authority in 2009 and is based in the UK. Financially, it has raised $275 million to date from private investors, including a recent $125 million raise. The new funds will be used to continue reactor development and expand TE Magnetics.

Participated · Seed · Jun 2024

Aikido Technologies develops a platform for floating offshore wind turbines that aims to slash project costs, reduce fabrication timelines and enable serial production. The platform's key features include pin joints for serialized production of 13 major steel components, a fold-up design that occupies two-thirds less space during assembly, a fit-for-purpose reusable assembly structure for quick placement and transport, and an upending procedure that requires only water ballast. The company is building its inaugural Aikido One platform with fabrication partner Morrison Energy in Harvey, Louisiana and plans a Gulf Coast demonstration in Fall 2024. Aikido will use the oversubscribed $4 million Series Seed to advance its offshore deployment technology, build its team, and develop a commercial pipeline. The company is supported by Breakthrough Energy Fellows, which is funding the first pilot deployment. The American Bureau of Shipping granted the concept an Approval‑In‑Principle in 2022, which the article cites as an endorsement of the design.

Participated · Seed · May 2024

Active Surfaces develops lightweight, flexible, high-efficiency solar technology intended for integration into a wide range of surfaces and materials. The company was spun out from MIT and is based in Woburn, MA. Founded by Shiv Bhakta and Richard Swartwout, Active Surfaces aims to make solar power ubiquitous by embedding photovoltaics into everyday materials and surfaces of any size. The company intends to use its recent funding to expand R&D efforts, scale up production, and bring its solar solutions to market. Active Surfaces secured a $5.6M pre-seed funding round to advance those plans.