The surge in mega-rounds for artificial intelligence startups and trillion-dollar valuations in US public markets is creating a distorted view of the venture capital landscape, according to new data from PitchBook.
While headline figures suggest a thriving ecosystem, the underlying metrics reveal a deepening crisis in returns for investors backing the sector.
PitchBook’s latest report indicates that the sheer volume of capital being raised by AI-linked companies is beginning to outpace investor demand.
This supply-demand imbalance poses a significant risk to the sustainability of current valuations, as limited partners face increasing pressure to justify allocations in a market where exit opportunities are becoming scarcer relative to the capital deployed.
The disconnect is particularly stark when comparing the first half of 2026, which saw record levels of venture capital investment in AI startups, with the current trajectory of fund performance.
Earlier reports highlighted the sector’s dominance in private markets, but the new analysis suggests that the pace of fundraising may be unsustainable without a corresponding increase in successful exits or revenue generation.