Key Takeaways
- • US venture capital funding totaled $10.15 billion across 458 companies in May 2025, representing a 20.0% month-over-month decline from April's $12.69 billion but showing stabilization signals through a 25.5% increase in deal volume.
- • Year-over-year funding contracted 27.5% compared to May 2024's $14.0 billion, indicating a persistently challenging funding environment despite emerging signs of market recalibration.
- • Artificial Intelligence dominated sector funding at $3.80 billion across 108 deals with an average deal size of $35.2 million, though average ticket sizes across all AI-adjacent categories ($82.6M for Machine Learning and $108.1M for Generative AI) suggest concentration in larger, more mature rounds.
- • Software and Machine Learning sectors combined for $4.47 billion in funding, with Software showing high deal velocity (115 companies) at lower average ticket sizes ($19.5 million), while Machine Learning demonstrated selective deployment of capital (27 deals at $82.6 million average).
- • The shift toward increased deal count relative to total capital deployed reflects investor transition from mega-round concentration to more distributed, measured investment thesis, with overall average deal sizes declining compared to earlier 2025 activity.
Summary
US venture capital funding in May 2025 contracted sequentially but demonstrated emerging stabilization markers amid an extended market recalibration cycle. According to AlleyWatch's May 2025 US Venture Capital Funding Report, $10.15 billion was deployed across 458 portfolio companies—a 20.0% decline from April's $12.69 billion but accompanied by a meaningful 25.5% increase in the number of funded companies. This divergence between capital volume and deal count suggests investors are shifting away from concentration in mega-rounds toward a broader, more conservative allocation strategy.
The year-over-year perspective reveals material headwinds, with May 2025 funding down 27.5% from the $14.0 billion deployed in May 2024. This sustained contraction underscores structural constraints in the venture market, though the maintenance of near-460 deal counts indicates investor appetite remains present, albeit deployed at lower per-transaction values.
Artificial Intelligence and machine learning categories continued to command investor focus, collectively accounting for approximately $7.76 billion—roughly 76% of total funding. AI specifically attracted $3.80 billion across 108 transactions with an average deal size of $35.2 million. Machine Learning deals, narrower in volume at 27 transactions, commanded substantially higher average ticket sizes at $82.6 million, while Generative AI—the most concentrated category—deployed $1.73 billion across 16 deals averaging $108.1 million per transaction. Software followed as the second-largest sector by total capital, capturing $2.24 billion across 115 deals at $19.5 million average size, reflecting broad-based but smaller-scale investment across the category.
The data reflects a qualitatively different funding environment from early 2025. Rather than mega-rounds and concentrated capital deployment, investors are displaying measured discipline, with more companies accessing capital at appropriately scaled ticket sizes. This pattern—declining total capital but rising deal counts—suggests the venture market is pricing risk more conservatively while maintaining deployment velocity across a diversified set of opportunities.
The year-over-year perspective reveals material headwinds, with May 2025 funding down 27.5% from the $14.0 billion deployed in May 2024. This sustained contraction underscores structural constraints in the venture market, though the maintenance of near-460 deal counts indicates investor appetite remains present, albeit deployed at lower per-transaction values.
Artificial Intelligence and machine learning categories continued to command investor focus, collectively accounting for approximately $7.76 billion—roughly 76% of total funding. AI specifically attracted $3.80 billion across 108 transactions with an average deal size of $35.2 million. Machine Learning deals, narrower in volume at 27 transactions, commanded substantially higher average ticket sizes at $82.6 million, while Generative AI—the most concentrated category—deployed $1.73 billion across 16 deals averaging $108.1 million per transaction. Software followed as the second-largest sector by total capital, capturing $2.24 billion across 115 deals at $19.5 million average size, reflecting broad-based but smaller-scale investment across the category.
The data reflects a qualitatively different funding environment from early 2025. Rather than mega-rounds and concentrated capital deployment, investors are displaying measured discipline, with more companies accessing capital at appropriately scaled ticket sizes. This pattern—declining total capital but rising deal counts—suggests the venture market is pricing risk more conservatively while maintaining deployment velocity across a diversified set of opportunities.
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