Monthly roundup · Energy · October 2026

Energy startup funding, October 2026: ASI's $325M Series C leads 33 rounds

By Millionrounds ResearchPublished 1 November 2026Updated 4 November 2026

We read 33 equity rounds in Energy announced in October 2026, raising $1.3B between them: 5% of all the rounds we read that month and 2% of the money. The largest was ASI's $325M Series C, led by Spark Capital. The median seed round was $6.3M, against $5.0M over the last twelve months in Energy; at Series A it was $17M.

Equity rounds33in Energy, 29 with an amount
Raised$1.3Bacross those rounds
Lead named76%of rounds say who led
Share of the month5%of rounds; 2% of the money

The biggest rounds

  1. 1ASISeries C · United States · led by Spark Capital$325M
  2. 2VoltusSeries D · United States · led by Generation Investment Management, ACTivate Capital$225M
  3. 3Group14 TechnologiesSeries D · United States$169M
  4. 4VEIRSeries C · United States · led by Matter Venture Partners, Tyche Partners$110M
  5. 5Peak EnergySeries B · United States · led by GM Ventures$108M
  6. 6Skeleton TechnologiesGrowth · Estonia · led by Siemens$100M
  7. 7Rabot EnergySeries B · Germany · led by Endeit Capital, DTCF$50M
  8. 8OptivoltSeries A · United States · led by VXI Capital$32M
  9. 9EmvolonSeries A · United States$22M
  10. 10Helical FusionSeries B · Japan$20M

Day by day

Equity rounds in Energy announced each day of October. The busiest day was 20 October, with 4.

1 October31 October

By stage, against the year

Each stage's median this month beside its twelve-month median: the sector's own where we hold enough rounds for a benchmark, otherwise the one across all sectors.

Pre-seed6$3.0Mthis month$2.0M12 months, all sectors
Seed9$6.3Mthis month$5.0M12 months here
Series A7$17Mthis month$26M12 months here
Series B3$50Mthis month$50M12 months, all sectors
Series C4$65Mthis month$100M12 months, all sectors
Series D2$197Mthis month$150M12 months, all sectors
Growth2$100Mthis month$113M12 months, all sectors

Where

United States had the most Energy rounds this month.

Against the month

  • Rounds, Energy33
  • Rounds, all sectors733
  • Raised, Energy$1.3B
  • Raised, all sectors$59B

The whole of October 2026

Other sectors in October

411 roundsAI→100 roundsFintech→72 roundsHealthcare→67 roundsSoftware→67 roundsRobotics→56 roundsManufacturing→44 roundsSaaS→44 roundsConstruction→42 roundsHardware & Electronics→41 roundsBiotech→34 roundsBig Data & Analytics→33 roundsLogistics→32 roundsEnterprise Software→29 roundsAerospace & Space→29 roundsHealthtech→28 roundsCybersecurity→26 roundsDefence Tech→25 roundsCloud→24 roundsEntertainment→23 roundsB2C→23 roundsFinancial Services→22 roundsMedical Devices→20 roundsCleantech→19 roundsE-commerce→19 roundsFood & Beverage→18 roundsReal Estate→18 roundsDeeptech→18 roundsSemiconductors→17 roundsAgtech→16 roundsDeveloper Tools→15 roundsWeb3 & Crypto→15 roundsRetail→15 roundsMartech→14 roundsSupply Chain→14 roundsInsurtech→14 roundsTelecoms→14 roundsClimate Tech→13 roundsRegtech→13 roundsAutomotive & EVs→13 roundsChemicals & Materials→12 roundsFuture of Work→12 roundsB2B→12 roundsMedia→12 roundsGaming→11 roundsProfessional Services→11 roundsMarketplaces→11 roundsHR Tech→11 roundsEducation→11 roundsSalestech→10 roundsProptech→10 roundsPharma→10 roundsFashion→10 roundsTravel & Hospitality→