Monthly roundup · Climate Tech · September 2026

Climate Tech startup funding, September 2026: Reverion's $175M Series B leads 13 rounds

By Millionrounds ResearchPublished 1 October 2026Updated 9 October 2026

We read 13 equity rounds in Climate Tech announced in September 2026, raising $425M between them: 4% of all the rounds we read that month and 1% of the money. The largest was Reverion's $175M Series B, led by Kembara. The median seed round was $4.6M, against $4.6M over the last twelve months in Climate Tech; at Series A it was $13M. HTGF High-Tech Gründerfonds led the most rounds, with 2.

Equity rounds13in Climate Tech, 12 with an amount

Raised$425Macross those rounds

Lead named69%of rounds say who led

Share of the month4%of rounds; 1% of the money

The biggest rounds

Day by day

Equity rounds in Climate Tech announced each day of September. The busiest day was 15 September, with 4.

1 September30 September

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-seed3$1.5Mthis month$2.0M12 months, all sectors

Seed4$4.6Mthis month$4.6M12 months here

Series A2$13Mthis month$14M12 months here

Series B2$138Mthis month$50M12 months, all sectors

Growth2$55Mthis month$113M12 months, all sectors

The most active leads

Firms that led two or more of the month's rounds in Climate Tech.

HTGF High-Tech GründerfondsDepotcharge, Jaipur Robotics2 led

Where

Canada2
Germany2
United States2
Egypt1
United Kingdom1
India1
Kenya1
Switzerland1

Canada had the most Climate Tech rounds this month.

Against the month

Rounds, Climate Tech13
Rounds, all sectors357
Raised, Climate Tech$425M
Raised, all sectors$39B

The whole of September 2026