Monthly roundup · Cleantech · August 2026

Cleantech startup funding, August 2026: Panthalassa's $225M Growth leads 11 rounds

By Millionrounds ResearchPublished 1 September 2026Updated 25 October 2026

We read 11 equity rounds in Cleantech announced in August 2026, raising $692M between them: 5% of all the rounds we read that month and 3% of the money. The largest was Panthalassa's $225M Growth, led by Hanwha Asset Management and 8090 Industries. The median seed round was $23M, against $5.5M over the last twelve months across all sectors; at Series A it was $35M.

Equity rounds11in Cleantech, 11 with an amount
Raised$692Macross those rounds
Lead named73%of rounds say who led
Share of the month5%of rounds; 3% of the money

The biggest rounds

  1. 1PanthalassaGrowth · United States · led by Hanwha Asset Management, 8090 Industries$225M
  2. 2EErco EnergíaSeries C · Colombia$129M
  3. 3GeoPuraSeries A · United Kingdom$113M
  4. 4DDongxi FusionPre-seed · China$45M
  5. 5Ore EnergySeries A · Netherlands · led by HV Capital, Plural$43M
  6. 6Voya EnergySeries A · United States · led by Energy Impact Partners$35M
  7. 7AApollo AtomicsSeed · United States · led by FCVC$31M
  8. 8AAdvanced Electric Machines (AEM)Growth · United Kingdom · led by Northstar Ventures$22M
  9. 9VessevSeries A · New Zealand · led by Blackbird$19M
  10. 10Princeton Critical MineralsSeries A · United States · led by SOSV$16M

Day by day

Equity rounds in Cleantech announced each day of August. The busiest day was 4 August, with 2.

1 August31 August

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-seed1$45Mthis month$2.0M12 months, all sectors
Seed2$23Mthis month$5.5M12 months, all sectors
Series A5$35Mthis month$20M12 months, all sectors
Series C1$129Mthis month$100M12 months, all sectors
Growth2$123Mthis month$113M12 months, all sectors

Where

United States had the most Cleantech rounds this month.

Against the month

  • Rounds, Cleantech11
  • Rounds, all sectors220
  • Raised, Cleantech$692M
  • Raised, all sectors$25B

The whole of August 2026

Other sectors in August

117 roundsAI→32 roundsFintech→24 roundsRobotics→21 roundsConstruction→18 roundsHealthcare→18 roundsSoftware→17 roundsEnergy→14 roundsLogistics→14 roundsBig Data & Analytics→13 roundsDefence Tech→12 roundsEnterprise Software→12 roundsCloud→11 roundsBiotech→11 roundsCybersecurity→10 roundsClimate Tech→