Breakthrough Energy Ventures

Commonwealth Fusion Systems is the world's largest and leading commercial fusion energy company, focused on developing high-temperature superconducting magnets to enable the transition to clean, abundant fusion energy.

Boston Metal is redefining global metals production with its patented Molten Oxide Electrolysis (MOE) platform technology, which produces steel without carbon emissions and recovers valuable metals from mining waste.

Form Energy is an American company driving innovation in energy manufacturing and technology. Our cost-effective, multi-day energy storage solutions are designed to ensure a clean, secure, and reliable electric grid, even during prolonged periods of stress.

QuantumScape is on a mission to transform energy storage with solid-state lithium-metal battery technology, enabling greater energy density, faster charging, and enhanced safety for a lower carbon future.

Redwood Materials is focused on recycling end-of-life batteries to recover critical materials such as lithium, nickel, cobalt, and copper, while also deploying energy storage systems for data centers and the national grid.

KoBold Metals is a scientific mineral exploration and development company focused on critical minerals, utilizing AI and human expertise to enhance discovery processes.

Electric Hydrogen focuses on developing high-power electrolyzers to produce clean hydrogen at the lowest cost, aiming to empower industrial decarbonization.

H2Pro specializes in the production of affordable green hydrogen, focusing on applications in renewable energy, transportation, and various industrial sectors.

Lilac is a leading technology provider of commercially ready ion exchange (IX) solutions that unlock faster, cheaper, and cleaner production to meet lithium needs now, not later.

Pivot Bio develops crop nutrition technologies that harness the power of nature to deliver nitrogen to plants, enabling microbes to convert atmospheric nitrogen and provide it to crops throughout the growing season. Their solutions aim to improve profitability, predictability, safety, and sustainability for farmers.

Heart Aerospace is building the platform to power a new era for regional aviation, focusing on electric flight with the ES-30 aircraft, aiming to reduce emissions and operating costs.

Malta Inc. offers utility-scale, long-duration energy storage systems using steam-based heat pump technology to deliver dispatchable, cost-effective energy.

Clean Energy Ventures funds disruptive, capital-light technologies and business model innovations that reshape how we produce and consume energy. Since 2005, the leadership team has invested in 40+ climate tech startups with the potential to substantially reduce greenhouse gas emissions by 2050. The firm requires every investment to demonstrate 2.5 gigatons of CO2 mitigation potential using their proprietary calculator. More than 60% of the investment team holds advanced science or engineering degrees to provide hands-on technical support. Their track record includes only ~15% write-offs in hardware-focused cleantech, unusually low for a sector where 90%+ of post-2007 funded companies failed to return capital.

Prelude Ventures manages capital exclusively for the climate-focused Simons family, creating a single-LP structure that demands strict venture returns from a 100% climate portfolio while applying a hard "no fossil fuels" rule that rejects any technology making oil, gas, or coal extraction cheaper or longer-lived. The firm combines deep technical operating experience with climate activism roots and has invested continuously through climate tech's "dark years" since 2009, positioning itself as a climate generalist comfortable with high capital intensity and long hardware timelines across the entire low-carbon economy.

Early-stage climate investor using a 12,000+ startup proprietary database and hedge-fund-style quantitative screening instead of relationship sourcing, often taking board seats (96%) and offering Rocky Mountain Institute sector expertise.

Leads deep-tech, hardware-heavy climate investments across cutting emissions, carbon removal, and time-buying solutions, backing nonprofit research and offering in-house scientific expertise plus hands-on technical, hiring, and regulatory support.

A family office-backed venture fund focused on climate-sensitive clean energy, healthcare, food, and air innovations.