Global Climate Tech Investment Reaches $40.5 Billion in 2025, Led by US and Major Acquisitions
Global climate tech investment reached $40.5 billion in 2025, marking an 8% increase from the previous year and reversing declines from 2023 and 2024. While the number of deals fell by 18%, investments concentrated on larger, growth-stage companies, highlighted by a $1.6 billion funding round for a state-backed nuclear fusion startup in China. The United States continues to lead in climate tech investment, with European oil giants like Shell and BP actively acquiring climate startups.

Global climate tech investment in 2025 increased by 8% year-over-year to $40.5 billion, reversing declines seen in 2023 and 2024. Despite an 18% drop in the total number of deals, there was a focus on larger, growth-stage companies.
The largest deal was a $1.6 billion investment in a state-backed nuclear fusion startup in China. The United States remains the top hub for climate tech investment, with European oil majors, including Shell and BP, leading in acquisitions of climate startups.




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