Energy
Nuclear, batteries, geothermal, fusion and the grid. 16 companies, $2.97B in disclosed funding.
| SpaceX alumni founders | |||||
|---|---|---|---|---|---|
| Base Power Home battery systems that double as a distributed power plant. | Energy | Justin Lopas | 2023 | Austin, TX | $2.2B |
| Radiant Portable nuclear microreactors that ship in a container. | Energy | Doug Bernauer | 2019 | El Segundo, CA | $505M |
| Arbor Energy Rocket-engine turbine technology for clean, firm power. | Energy | Brad Hartwig | 2022 | California | $55M |
| Endurance Energy Geothermal power from undersea volcanic heat. | Energy | Andrew Redd | 2024 | Seattle, WA | $54M |
| General Matter Domestic uranium enrichment for American reactors. | Energy | Scott Nolan | 2024 | California | $50M |
| Romeo PowerAcquired Battery packs for commercial electric vehicles. | Energy | Porter Harris | 2016 | Vernon, CA | $30M |
| Critical Loop Modular microgrids that get industrial sites powered sooner. | Energy | Not yet named | — | Los Angeles, CA | $26M |
| Critical Energy Factory-built geothermal plants based on rocket turbines. | Energy | Spencer Jackson | — | Not disclosed | $22M |
| Electric Era Battery-backed EV fast chargers for convenience stores. | Energy | Quincy Lee, Sam Reineman | — | Seattle, WA | $19.5M |
| Maritime Fusion Fusion reactors designed to power ships. | Energy | Justin Cohen | 2025 | Not disclosed | $4.5M |
| Ambrosia Energy Solar-plus-storage power plants for data centers. | Energy | Sara Spangelo, Ben Longmier | — | Not disclosed | — |
| Applied Atomics Reviving a proven small reactor design for data centers. | Energy | Ben Kellie, Paul Keutelian, Mark Lambert | 2025 | New Orleans, LA | — |
| Hgen Electrolyzers for industrial-scale green hydrogen. | Energy | Colin Ho | — | Los Angeles, CA | — |
| Planted Solar Faster, cheaper installation for utility-scale solar. | Energy | Richard Erb | — | Not disclosed | — |
| Power.Global Swappable battery modules for light EVs and storage. | Energy | Porter Harris | — | Pasadena, CA | — |
| Virtus Solis Solar power collected in orbit and beamed to Earth. | Energy | John Bucknell | — | Not disclosed | — |