Prometheus (prometheus.ai), an artificial intelligence company headquartered in San Francisco, California, recently announced the completion of a $12 billion Series B funding round, valuing the company at $41 billion post-money. This makes it the largest single funding round in the global AI sector in 2026.
Founded in November 2025, the company has been rapidly raising funds since its inception. Its first funding round, coinciding with its public debut, raised $6.2 billion in a Series A round, laying a solid financial foundation for its early development. Just seven months later, the company launched its second funding round, ultimately securing $12 billion in Series B funding. Combined, these two rounds bring Prometheus’s total funding to over $18 billion, demonstrating its strong financial backing.
This round boasted a powerful lineup, with founder Jeff Bezos personally investing, and participation from several top global institutions including JPMorgan Chase, Goldman Sachs, and BlackRock. Prometheus focuses on the “Physics AI” track, targeting fields such as aerospace and advanced manufacturing, and is committed to creating AI tools that can assist industrial R&D. This large amount of funding will mainly be used to expand computing power to support technology research and development and business expansion. The significant increase in valuation in just a few months fully demonstrates the capital market’s high recognition of its technological direction and development potential.
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