Jeff Bezos just co-signed one of the largest AI funding rounds in history, and it has nothing to do with chatbots. Prometheus, the industrial AI company Bezos co-leads, closed a $12 billion Series B that values the startup at $41 billion.
From $6.2B to $41B in about seven months
Prometheus closed its Series A at $6.2 billion back in November 2025, with Bezos as the largest backer. Now, roughly seven months later, the company has more than sextupled its valuation.
The Series B round, which closed on June 11, 2026, pulled in institutional heavyweights. JPMorgan Chase, Goldman Sachs, and BlackRock all participated alongside Bezos.
Prometheus is co-led by Bezos and Vik Bajaj, a former Google executive and co-founder of Verily, Alphabet’s life sciences subsidiary.
