AI companies made up 36.4% of funded startups in Q1 2026 but absorbed 57% of all disclosed venture capital, according to Fundraise Insider’s first quarterly funding report published this week. The report covers 1,729 companies that raised a combined $174.5 billion between January and March 2026.
The Concentration Numbers
The capital concentration at the top is extreme. The 10 largest rounds captured 51.1% of all disclosed capital. The top 50 took 67.7%, leaving 1,372 disclosed deals to split less than a third of the money.
Six AI mega-rounds drove the headline number: Anthropic at $30 billion (Series G), xAI at $20 billion (Series E), Waymo at $16 billion (Series D), OpenAI at $10 billion, Nscale at $2 billion (Series C), and Skild AI at $1.4 billion. Together those six rounds totaled $79.4 billion, or 45.5% of the quarter’s disclosed dollars, according to the full report.
Strip out those six rounds and Q1 still produced roughly $95 billion across more than 1,400 companies. The underlying market is healthy. It is operating in the shadow of a capital event happening above it.
The Graduation Effect
The structural pattern in the data is how AI company density rises at each funding stage. AI startups represented 44.3% of pre-seed deals, 46.4% of seed rounds, 53.5% of Series A, and 59.2% of Series B, per the report. AI founders are converting to follow-on rounds at higher rates than their non-AI peers.
For the agent infrastructure market specifically, this acceleration matters. Companies building agent governance platforms, orchestration layers, and security tooling (such as TrueFoundry, Capsa AI, and Trust3 AI, all of which raised or launched products in the past two weeks) are likely among the beneficiaries of this concentrated capital flow.
Stage Benchmarks and Debt
Median round sizes held at clean multiples across stages: seed at $4 million, Series A at $20 million, Series B at $50 million, Series C at $75 million, and Series D at $146.5 million, according to the report.
One underreported trend: debt financing reached 171 deals and $35.1 billion in Q1, with a $100 million median, larger than the Series C median. Debt has become concentrated in fintech, renewables, data centers, and real estate, the report found. For AI companies, the emergence of debt as a standard funding mechanism reflects maturing revenue profiles that can support lending.
Geography
California took 28.9% of deals and 63.7% of capital. California, New York, and Texas together produced half of all funded companies. Deal flow held steady at 130 to 155 newly funded companies per week throughout the quarter, with no slow weeks, per the report.
The Warning for Non-AI Founders
The report’s central conclusion carries a warning. With AI’s share of Series B deals nearing 60%, the follow-on bar is structurally higher for companies without an AI story, regardless of their metrics. Chris Walker, founder of Fundraise Insider, told OpenPR that the buying window after a funding round is narrow: “The companies that win those deals are the ones who show up in week 1, not month 6.”
For builders in the agent ecosystem, the capital environment is as favorable as it has ever been. Whether that capital translates into durable businesses or another cycle of overinvestment will depend on what ships in the next 12 months.