"August 2025 demonstrated solid venture capital activity with $8.19B invested across 393 companies, showing a 9.4% decrease from July 2025's $9.04B but maintaining robust deal flow. The month was characterized by exceptional mega-rounds in clean energy and quantum computing, alongside continued strong investor interest in artificial intelligence and healthcare solutions. Clean energy led breakthrough funding with Commonwealth Fusion Systems raising $863M, while Artificial Intelligence maintained strong momentum with $2.32B in funding across 128 companies (28% of total funding)."
"Average deal size: $20.9M (increased from July's $18.9M) Median deal size: $6.0M (consistent deal flow across all stages) Largest deal: Commonwealth Fusion Systems at $863M Funded companies: 393 (robust deal activity) AI funding share: 28.3% of total funding ($2.32B) Series B + Late-stage concentration: 71.0% of total funding Industry Insights Clean Energy and Quantum Computing dominated the headlines with Commonwealth Fusion Systems' record $863M Series B for fusion energy and Quantinuum's $600M Series B for quantum computing."
Total US startup funding in August 2025 reached $8.19B across 393 companies, a 9.4% decline from July 2025 and a 12.9% drop versus August 2024. Average deal size rose to $20.9M while the median remained $6.0M, indicating larger late-stage rounds. Series B and later rounds comprised 71.0% of total funding. Artificial intelligence attracted $2.32B across 128 companies, representing 28.3% of funding. Clean energy and quantum computing saw headline mega-rounds, led by Commonwealth Fusion Systems' $863M Series B and Quantinuum's $600M Series B. Deal flow remained robust despite lower monthly totals.
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