State of Climate Tech Q3 2026: Equity Rebounds as Debt Retreats

Climate Tech companies raised $19.6B in the third quarter of 2026, 7.6% less than in Q2. On its own, that number suggests a slowdown. The detail behind it tells a different story: equity rose 17%, every equity stage grew, and the dip came almost entirely from asset-backed debt.

Built on the data tracked by the Net Zero Insights platform, the report breaks down where Q3 capital went. Here are four trends that stood out, and what you will find on each in the full report.

1. Venture equity rebounds as debt retreats

Equity funding reached $15.8B in Q3, up 17% on Q2 and about 26% on Q3 2025. Asset-backed debt roughly halved to $3.1B, which is why total funding eased to $19.6B. Deal count kept falling to 686, the fewest since 2021: more equity, spread across fewer deals.

In the report: quarterly funding by financing type and deal count since 2021, on a restated, consistent methodology. See the full trend →

2. Growth across every stage, led by Series B

Every equity stage grew quarter on quarter. The standout was Series B, up 50% to $3.6B, reversing the weakness it showed through 2025 and into 2026. That matters for companies that need that round to move from pilot to first commercial deployment.

In the report: equity by stage, continent, country and challenge area, so you can see exactly where each stage grew. Get the stage breakdown →

3. Firm power is the defining theme of the quarter

Fusion, fission, geothermal and storage raised about $6.3B across 17 rounds in Q3, including three $1B rounds for Commonwealth Fusion Systems, Valar Atomics and Base Power.

In the report: the ten largest rounds of the quarter, and which other firm power companies investors backed. See the top ten rounds →

4. The US pulls ahead as exits cool

The United States led with $8.8B of equity across 184 deals, up 36% on Q2, followed by the United Kingdom ($1.5B, up 74%) and China ($1.4B, down 18%). Exits cooled after a strong second quarter, with 78 against 99 in Q2, and M&A still made up about 78% of them as IPO and SPAC routes stayed narrow.

In the report: the full country table and exit activity by type, region and challenge area. Get the country and exit data →

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