FluidStack Eyes $1B Raise at $18B Valuation Led by Jane Street

FluidStack, the AI data center startup backed by Anthropic’s $50B deal, is in talks to raise $1 billion at an $18 billion valuation.

FluidStack, a fast-growing startup that builds specialized data centers exclusively for artificial intelligence companies, is currently in advanced discussions to raise approximately $1 billion in fresh capital.

Notably, financial trading giant Jane Street and Situational Awareness, an AGI-focused investment fund are reportedly in talks to co-lead the round. Furthermore, investment bank Morgan Stanley is understood to be advising on the transaction.

To put the growth in context, as recently as December 2025, FluidStack was in talks to raise around $700 million at a valuation of just $7.5 billion. Although that round was never formally announced, it set the stage for what has since become a dramatically stronger negotiating position. Consequently, the new $18 billion target represents a staggering 140% jump in valuation within just a few months.

Also Read : Sygaldry Raises $139M to Put Quantum Computers Inside AI Data Centers

In November 2025, Anthropic, the AI safety company behind the Claude family of models announced a landmark $50 billion infrastructure partnership with FluidStack. Under the agreement, FluidStack will build custom-designed data centers in Texas and New York, with facilities coming online throughout 2026. These sites are, notably, purpose-built to maximize efficiency for Anthropic’s specific AI workloads. The deal also marked the first time Anthropic had built major infrastructure independently, rather than relying purely on cloud partners such as AWS or Google.

Moreover, the partnership is expected to create approximately 800 permanent jobs and 2,400 construction roles across both states.

The investor roster for the upcoming round is equally noteworthy. The December 2025 round, which laid the groundwork for the current raise, was led by Situational Awareness, a fund co-founded by former OpenAI researcher Leopold Aschenbrenner. That round was also backed by the Collison brothers of Stripe, former GitHub CEO Nat Friedman, and investor Daniel Gross.

Unlike hyperscalers such as Amazon Web Services or Microsoft Azure, which cater to all kinds of computing workloads. FluidStack focuses exclusively on AI infrastructure. This specialization, combined with the company’s ability to deploy data center capacity in months rather than years, has made it a go-to partner for frontier AI labs.

Indeed, FluidStack already counts Meta, Mistral, Midjourney, Character.AI, and Black Forest Labs among its clients, and manages over 100,000 GPUs globally. The Oxford-founded company has, furthermore, relocated its headquarters from London to New York as part of its strategic pivot toward the U.S. market.

FluidStack’s meteoric rise reflects a broader arms race playing out across the AI industry. As demand for compute continues to outpace supply, purpose-built AI infrastructure providers are emerging as some of the most valuable companies in tech. Therefore, it comes as little surprise that investors from trading firms like Jane Street to AGI-focused funds are rushing to back the picks-and-shovels layer of the AI economy.

Whether or not the current $1B round closes at the reported terms remains to be seen. Nevertheless, the very fact that FluidStack has attracted this level of investor attention within months of its Anthropic deal speaks volumes about where the industry’s growth trajectory is headed.

Disclaimer : This news is based on publicly available information. NervNow has not verified the details independently.

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