What are the current funding trends in climate tech?

Summary

Climate tech funding is higher in dollars in 2026, but the market is narrower, more selective, and far more concentrated in large energy-infrastructure rounds than the headline total suggests.

We tracked $10.29 billion of qualifying financing in the current year-to-date period, up 31.6% from last year, even as deal count fell 21% and the number of funded companies dropped 22%.

The typical financing has not changed much. The median round is $10 million, close to the levels seen in 2025 and 2024, while the average has surged to $50.2 million because a small number of very large transactions are pulling the market upward.

Remove the megadeals and the boom disappears. Funding excluding rounds above $50 million is down 15.9% year over year, while funding excluding rounds above $100 million is down about 20%.

Five companies alone, Base Power, Commonwealth Fusion Systems, Valar Atomics, Form Energy and Antora Energy, account for roughly $4.3 billion, or 41.8% of all climate-tech capital counted in the period.

Clean Energy Systems has become the financial center of the market. It represents 44.4% of deals but 83.1% of capital, as storage, nuclear, fusion and other power-infrastructure companies absorb increasingly large checks.

Early-stage activity remains important, but it is thinner. Seed and Series A still make up almost two-thirds of deals, yet both stages recorded fewer financings than last year, and first financings fell from 75 to 51.

Europe still leads by number of financings, while North America dominates dollars. North American companies account for 30.9% of deals but 72.9% of all capital, showing how heavily the largest rounds are geographically concentrated.

Corporate participation has also become less widespread. Strategic investors appeared in 29% of current financings, down from roughly 37% in both comparison periods, even though the median strategically backed round has held around the same level.

The clearest external force behind the current shift is pressure on power infrastructure. AI and data-center electricity demand are adding urgency to storage, generation, nuclear, fusion and grid investment, helping a small group of deployment-heavy companies raise at infrastructure-like scale.

The result is a climate-tech market with extraordinary capital at the top and weaker breadth underneath. The current funding trend is not a broad-based boom; it is a rotation toward fewer companies, larger checks and physical energy capacity.