Cleantech અંદર first half of 2026 saw investors pour $15 billion into seed‑through growth rounds, a figure that nudges the total past the 2025 tally of $15 billion and tops the $8 billion Q2 haul, the highest since 2024. The sector remains far below its 2021‑22 peak, and its share of total venture money shrinks as AI dominates.

The largest deals spotlight shifting priorities. Stockholm‑based Stegra raised $1.6 billion led by Wallenberg Investments to finish a large‑scale steel plant. In Troy, Michigan, Slate Auto secured $650 million in Series C; Jeff Bezos backs the electric pickup that can convert to an SUV. Fusion firms dominate the next tier: Helion Energy landed $465 million in a Series G, valuing it at $15.5 billion post‑money under Thrive Capital, while Inertia pulled $450 million in Series A from Bessemer Venture Partners.

Exits give investors confidence. Geothermal provider Fervo Energy went public in May, raising $1.9 billion and reaching a market cap of $8.6 billion. Nuclear‑reactor developer X‑energy also closed an IPO, netting $1 billion and a valuation of $5 billion. The International Energy Agency projects renewables and nuclear to account for 50 % of global power by decade’s end, with power demand growing 3.5 % annually.

Although cleantech still lagsModel AI in funding volume, capital concentrates in high‑capex areas—green steel, EV pickups, and fusion—where longer ROI cycles exist. Investors should monitor these hubs, as increased energy demand—especially from AI workloads—could lift capital inflows, but only if execution keeps pace with the scale of capital required.