"September 2025 marked an extraordinary month for US venture capital with $30.91B invested across 533 companies, showing a 281.6% increase from August 2025's $8.19B and a remarkable 311.9% year-over-year increase from September 2024's $7.5B. The monthly total was dominated by Anthropic's record-breaking $13B Series F round, alongside continued massive investments in AI infrastructure, quantum computing, and robotics. Artificial Intelligence dominated funding with an estimated $23.2B across AI-related companies (75% of total funding)."
"Total US startup funding in September 2025 reached $30.91B across 533 companies, representing a remarkable 281.6% increase from August 2025's $8.19B and an extraordinary 311.9% surge compared to September 2024's $7.5B. This historic month was anchored by Anthropic's record-breaking $13B Series F round, which alone accounted for 42% of the month's total funding. Key Metrics Average deal size: $58.0M (increased from August's $20.9M) Median deal size: $7.0M (showing healthy mid-market activity)"
US startup funding totaled $30.91B in September 2025 across 533 companies, a 281.6% month-over-month and 311.9% year-over-year increase. Anthropic's $13B Series F comprised 42% of the month's capital and sharply elevated average deal size to $58.0M while median deal size remained $7.0M. AI-related companies received roughly $23.2B (75% of total), with heavy emphasis on AI infrastructure. Funding concentrated in Series B and late-stage rounds at 86.9%. Significant deep-technology investments included $1.0B rounds for quantum computing and humanoid robotics, underscoring renewed appetite for large-scale, late-stage financing.
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