Prometheus raises $12 billion in Series B, valued at $41 billion

Prometheus, the AI startup co-founded by Jeff Bezos and Vik Bajaj, completed a Series B funding round of $12 billion on 11 June 2026. The round was led by JPMorgan Chase and BlackRock, with further participation from Goldman Sachs, DST Global and Arch Venture Partners. Bezos himself also invested. The company's valuation now stands at approximately $41 billion.

This is the second major capital round in a short period. In November 2025, Prometheus had already raised $6.2 billion in a Series A, in which Bezos was the largest individual backer. Total funding now exceeds $18 billion, accumulated in less than a year since the company's official founding.

Prometheus currently employs approximately 150 people and has offices in San Francisco, London and Zurich. The company has not yet published any commercial products or revenue figures.

What Prometheus aims to build

Prometheus describes its focus as "physical AI": systems that accelerate the design and manufacturing process for complex physical objects. Bezos speaks of the goal of developing an artificial general engineeran AI capable of assisting in the design and production of products such as jet engines, chips, spacecraft, medical devices and pharmaceutical compounds.

The thinking behind this approach is that engineering tasks, unlike purely digital tasks, are heavily bound by physical constraints, material behaviour and manufacturing processes. Existing large language models are trained on text and code, but lack the deep coupling with the physical world needed to, for example, design and validate a new aircraft engine. That coupling is precisely what Prometheus aims to place at its core.

In November 2025 the company acquired the startup General Agents. Further product details have not yet been announced.

Bezos' first CEO role since Amazon

Bezos stepped down as CEO of Amazon in 2021. At Prometheus he is taking on an operational role for the first time since then, serving as co-CEO alongside Vik Bajaj. He joined as a founding investor at the end of 2024 and later became involved in day-to-day management.

The fact that one of the most prominent names in the technology world is personally taking on an operational role visibly contributes to Prometheus's ability to attract capital. The Series B round, led by two of the world's largest asset managers, illustrates the willingness of financial institutions to commit early and at scale to AI companies that have yet to generate revenue.

Prometheus has attracted talent from, among others, OpenAI, Meta, Anthropic, xAI, Nvidia and Google DeepMind. That pattern, a small but dense team of experienced AI researchers with capital-intensive ambitions, appears to mirror the build-out of earlier frontier labs.

Use of capital and broader plans

A large portion of the new funding will go towards computing infrastructure. Training and deploying AI systems for physical engineering tasks requires substantial computational capacity, in part because simulations and model validation for physical objects are computationally more demanding than purely text-based applications.

There are also reports of plans for a separate $100 billion fund, referred to as a manufacturing transformation vehicle. The idea is that Prometheus would acquire or invest in industrial companies, so that operational data from those companies feeds back into its own AI models. Whether and when that fund will materialise has not yet been confirmed by the company itself.

For investors and builders in the AI sector, the round signals that the race around physical AI and industrial automation is attracting serious financing. The combination of frontier AI research with an explicit focus on the physical manufacturing industry distinguishes Prometheus substantively from labs that concentrate primarily on language and code models.