Top clean energy & climate companies
Clean energy and climate tech includes nuclear, fusion, batteries, carbon capture, and renewable infrastructure. These are the largest private companies in the space.
| # | Company | Valuation | Latest round | Headquarters |
|---|---|---|---|---|
| 1 | Commonwealth Fusion Systems | $10B | Series B | Devens, MA |
| 2 | Redwood Materials | $6B | Series D | Carson City, NV |
| 3 | TerraPower | $5B | Series C | Bellevue, WA |
| 4 | Helion Energy | $5B | Series E | Everett, WA |
| 5 | KoBold Metals | $4B | Series C | Berkeley, CA |
| 6 | Form Energy | $4B | Series F | Somerville, MA |
| 7 | Aurora Solar | $4B | Series D | San Francisco, CA |
| 8 | Base Power | $4B | Series A | Austin, TX |
| 9 | Fervo Energy | $3B | Series C | Houston, TX |
| 10 | Ascend Elements | $3B | Series D | Westborough, MA |
| 11 | X Energy | $3B | SPAC | Rockville, MD |
| 12 | Group14 Technologies | $3B | Series C | Woodinville, WA |
| 13 | Valar Atomics | $2B | — | — |
| 14 | Prometheus Fuels | $2B | Series B | Santa Cruz, CA |
| 15 | Radiant | $2B | Series C | El Segundo, CA |
| 16 | Palmetto | $2B | Series C | Charleston, SC |
| 17 | Arcadia | $2B | Series E | Washington, DC |
| 18 | Twelve | $2B | Series C | Berkeley, CA |
| 19 | Solugen | $2B | Series C | Houston, TX |
| 20 | Watershed | $2B | Series C | San Francisco, CA |
| 21 | Lyten | $1B | Series B | San Jose, CA |
| 22 | 24M | $1B | — | Cambridge, MA |
| 23 | ProLogium | $1B | Series D | Taoyuan, Taiwan |
| 24 | EcoFlow | $1B | Series B | Shenzhen, China |
| 25 | Gradiant | $1B | Series E | Woburn, MA |
| 26 | Span | $1B | Series B | San Francisco, CA |
| 27 | Sila | $250M | Series F | Alameda, CA |
Other lists
Valuations compiled from public sources and may be outdated. Not investment advice.