US Venture Hit $412.7B in Six Months. Over 80% Went to Megarounds.

US venture investment reached $412.7 billion in the first half of 2026, already exceeding any previous full-year total, per the first-half tally. More than 81% of those dollars went into rounds of $100 million or more. The half was defined by a handful of enormous AI rounds, with broad early-stage activity contributing little.

The 81% concentration figure carries the half. A venture market where four of every five dollars land in nine-figure rounds looks less like classic venture and more like late-stage growth and private equity, with capital clustering into a small set of AI companies raising at a scale that used to require the public markets. The $412.7 billion headline reads like a boom. The 81% figure says the boom is narrow.

For founders and operators, the split is the whole story. If you are building AI infrastructure or a frontier model, capital is abundant and rounds are enormous. If you are seed-stage and outside the AI-capital magnet, the same tape can feel like a drought, because the dollars are concentrated where the megarounds are. The record total and the thin distribution are one fact seen from two ends. Watch whether early-stage dollar volume recovers, because a venture market that funds only giants eventually starves its own pipeline.