Venture capital has shifted from small bets to giant wagers: so far this year, rounds of $1 billion or more have absorbed the majority of startup funding worldwide, according to Crunchbase data. Globally, roughly 60% of capital—about $320 billion—has gone to billion‑dollar rounds across stages. In the United States the tilt is even stronger: 73% of funding flowed into such megadeals, with $290 billion invested and just two financings for AI developers accounting for more than half that sum.
## Why billion‑dollar rounds now dominate funding
The headline figures reflect both larger checks and growing frequency. In the U.S. alone, Crunchbase records 23 known rounds of $1 billion or more this year, putting 2026 on pace with 2025, a record year, with several months still to go. These megadeals have been a major factor in driving global funding totals for the first half of the year to record levels.
## Who is receiving the biggest checks
Billion‑dollar rounds are overwhelmingly later‑stage financings or corporate investments. Only two of this year’s billion‑dollar rounds — Prometheus and World Labs — were classified as seed or early‑stage, per Crunchbase. At the top end, two AI companies dominate the U.S. totals: OpenAI and Anthropic. Their rounds, each unusually large, together account for more than half of U.S. investment in billion‑dollar deals to date.
## Lessons from the first wave of megadeals
The phenomenon of billion‑dollar rounds is relatively recent. The first U.S. example in Crunchbase’s record is Uber’s $1.2 billion Series D in 2014. Between then and the late 2010s, a small number of companies—including SpaceX, Airbnb, Lyft, SoFi, Snap, Grail, WeWork, Fanatics and Argo AI—secured ten‑figure rounds. Many of those companies later went public and reached valuations well above their private round levels: SpaceX, Uber and Airbnb have been cited as standout successes, with reported market‑value benchmarks cited in public reporting. Others did not fare as well: Argo AI and WeWork struggled after their megafundings, and Grail’s trajectory has been uneven. Fanatics has remained private and continues to operate at scale.
## The new scale of risk and reward
Investors learned from the early megadeals that concentrating unusually large sums into highly regarded unicorns can produce outsized returns but carries significant risk. In the current cycle the question of risk versus reward has expanded: OpenAI and Anthropic attracted rounds in the tens of billions, and discussion has turned to financings that exceed $100 billion in scale. Both companies have filed confidentially to go public, a step that could clarify the returns on these historic checks in the near term.
The rise of billion‑dollar rounds has changed the shape of venture capital: a smaller number of massive financings now captures the lion’s share of reported investment dollars. Whether that concentration produces more consistent winners or amplifies volatility for the market will depend on the public exits and long‑term performance of the companies behind this year’s largest rounds.
