$412.7B: US Venture Sets a New Baseline

US startups raised $412.7 billion in venture capital during the first half of 2026, a figure that surpasses every previous full-year record on record. To put that in context: the market didn't just have a strong first half, it rewrote the ceiling entirely. For founders and investors trying to calibrate expectations, deal terms, or fund deployment pace, this is the new baseline. Everything else is noise.

The number didn't arrive quietly. More than 81% of US venture capital in H1 went to deals of $100 million or larger, confirming that the headline figure is driven by mega-rounds rather than a rising tide lifting all boats. AI is the engine behind nearly all of it. OpenAI, Anthropic, and a tight cluster of foundation model companies have absorbed a disproportionate share of capital, with AI startups capturing an estimated 87.8% of total H1 funding. This is a concentrated boom, not a broad-based one.

April 2026 alone offered a sharp illustration of how lopsided things have gotten. According to AlleyWatch, capital that month grew 63.9% year-over-year, but a single transaction, Project Prometheus, accounted for nearly half of all capital deployed in that period. Strip it out and the underlying market reflected a healthy but far more modest $10.80 billion across 441 deals. The macro number is real. The distribution behind it is extreme.

This concentration carries real consequences for founders operating outside the AI mega-round orbit. Valuations at the top of the market are being set by a handful of transactions that most startups will never participate in. LPs are recalibrating return expectations based on a data set skewed by outliers. And fund managers face mounting pressure to deploy into AI at prices that may not reflect underlying fundamentals. The H1 benchmark is useful, but it requires a sharp read of who it actually reflects.

Heading into H2 2026, the pressure on this number is significant. If the mega-round pace slows, even modestly, full-year totals could flatten in ways that look like a correction but simply reflect deal timing. LPs will be watching deployment velocity closely. Founders in sectors outside AI, particularly climate tech, robotics, and enterprise software, may find the narrative shifting in their favor as investors seek diversification away from an increasingly crowded and expensive AI trade. The $412.7 billion sets the bar. The real question is what the market looks like when the handful of companies holding it up finally step back.