The June 2026 US Venture Capital Funding Report

US venture capital activity reached $19.27 billion across 429 companies in June 2026, with AI infrastructure emerging as the dominant force in American startup funding. Baseten’s $1.5 billion Series F at a $13 billion valuation anchored the month, confirming that inference serving has become its own high-stakes capital category, and AppsFlyer’s $1 billion Series E underscored the durability of revenue-stage software at the growth end of the market. Forty-six companies raised $100 million or more, and AI-focused startups captured 59.8% of all capital deployed. California continued its structural dominance at 47.9% of national funding, though New York’s 24.4% share was the highest the city has recorded in at least a year.

US Funding by Stage: June 2026

Late-stage capital accounted for 58.8% of national venture deployment in June, with a $218M average that reflects a cohort of genuinely large companies raising at scale. Eight Series A rounds exceeded $100 million, inflating that stage’s average to $37.6M against a $20M median; the gap signals a bifurcated A market in which a handful of high-conviction bets sit alongside a larger volume of more conventional first institutional rounds. Early-stage activity was healthy in deal count at 248 rounds but modest in capital at $1.83B, consistent with a national market that has re-priced seed and pre-seed rounds downward while reserving outsized capital for proven late-stage platforms.

Top 10 US Venture Capital Deals: June 2026

Note: NinjaOne and Generalist AI also raised $400M in June, tying Suno and Ionic Digital for the ninth and tenth positions.

The Inference Layer Becomes Its Own Asset Class

The month’s defining investment thesis played out across multiple rounds, not just one. Baseten raised $1.5 billion on June 22, led by Altimeter Capital, Conviction, and Spark Capital, with the company’s platform processing more than 1 billion inference calls per day across 87 clusters on 18 clouds, and revenue growing 20x year over year. It was the company’s fourth fundraise in 18 months. Groq raised $650 million for its custom inference chip and serving platform in the same month. The simultaneity is not a coincidence: as enterprises move AI workloads from pilot to production and agentic systems multiply the number of model calls per task, inference capacity has become the critical bottleneck, and capital is racing to fund the companies that own that layer. The combined $2.15 billion raised by Baseten and Groq alone represented more than 11% of total US venture activity in June.

The theme extended into energy. Helion Energy’s $465 million Series G reflected the same underlying constraint from a different angle: AI data centers are creating power demand that existing infrastructure cannot meet, and fusion energy is attracting serious capital as a long-horizon answer to that problem. Impulse Space’s $500 million Series D, while not AI-driven, reflected parallel conviction in physical infrastructure at a moment when capital is increasingly willing to fund hard tech with long timelines. June’s top 10 spanned software, chips, developer tooling, space propulsion, and nuclear energy, suggesting that the current investment cycle is broader than any single category.

California vs. The Field

California’s 47.9% share of national capital was structurally typical but worth examining in context: the state’s four companies in the top 10 (Baseten, AppsFlyer, Supabase, and Groq) accounted for $3.65B of the $9.23B total, meaning more than half of California’s June funding flowed outside the top 10 into a deep bench of mid-sized rounds. New York’s 24.6% share was its highest in recent memory, with the state’s 84 deals averaging $56.6M. The rest of the country collected a combined $4.59B across 186 companies, a reminder that the two coasts continue to dominate venture geography even as the absolute dollar amounts raised outside them are growing.

Looking Ahead

The inference infrastructure story that defined June is unlikely to slow in July. Baseten’s fourth raise in 18 months and Groq’s continued expansion reflect a market in which the serving layer is being built out at extraordinary speed, and the companies that own that infrastructure are raising pre-emptively to lock in capacity advantages. The energy constraint is equally durable: Helion’s raise is one of several fusion and advanced nuclear bets that have closed in 2026, and the data center power problem will not resolve on a quarterly timeline. What bears watching nationally is whether the Series A bifurcation persists, with eight rounds above $100M sitting alongside a broader market clearing at $20M. If the high end of Series A reflects AI-native companies raising institutional rounds at scale, July should reveal whether that pattern belongs to a specific cohort of 2024-vintage companies or whether it is structural to the current market.

Methodology

This report analyzes Crunchbase venture funding data for rounds announced by US-based companies in June 2026, excluding biotech, real estate, lending startups, and debt financings. Funding amounts are classified into four stages: Early-Stage (pre-seed, seed, angel), Series A, Series B, and Late-Stage (Series C and beyond). All figures represent disclosed funding amounts and may not capture undisclosed rounds.