We tracked 26 startup funding rounds in Climate & energy so far in 2026, together worth $3.57bn in disclosed funding. The median disclosed round was $27.5m.
The largest was Valar Atomics's $1bn Series B round, led by Sequoia Capital. 9 rounds reached $100m or more and accounted for 91% of the money.
By region, North America took $2.79bn (78%).
1 company raised at a valuation of $1bn or more: Proxima Fusion.
The biggest rounds
- 1Valar AtomicsSeries B · Climate & energy · Hawthorne$1bn
- 2Antora EnergySeries C · Climate & energy · San Jose$550m
- 3Proxima FusionSeries B · Climate & energy · Munich$468m
- 4InertiaSeries A · Climate & energy · Livermore$450m
- 5VoltusSeries D+ · Climate & energy · San Francisco$225m
- 6Type One EnergySeries B · Climate & energy · Knoxville$200m
- 7Mazama EnergySeries B · Climate & energy · Frisco$135m
- 8VEIRSeries C · Climate & energy · Woburn$110m
- 9Peak EnergySeries B · Climate & energy · Burlingame$108m
- 10Rabot EnergySeries B · Climate & energy · Hamburg$56m
Figures cover the rounds in our tracker, which records disclosed amounts converted to US dollars at announcement. See the methodology.
Related reports and rankings
Climate & energy funding roundsBiggest Climate & energy funding rounds of 2026AI startup funding in 2026Defence & space startup funding in 2026Robotics & hardware startup funding in 2026Healthtech & bio startup funding in 2026Mobility & logistics startup funding in 2026Fintech startup funding in 2026Developer tools startup funding in 2026Cybersecurity startup funding in 2026Legal & compliance startup funding in 2026Commerce & marketing startup funding in 2026Enterprise software startup funding in 2026Consumer & media startup funding in 2026HR & work startup funding in 2026Proptech startup funding in 2026Edtech startup funding in 2026