Fluidstack Raised $1.5B at Over $18B, Led by a Quant Fund Rather Than a Venture Firm
Forbes·high signal
Fluidstack closed a $1.5B round led by Jane Street at a valuation above $18B, reported September 3-4, up from an $830M Series A at $7.5B earlier in 2026. The company builds and operates data centers for Google and Anthropic rather than selling a model, and Forbes frames it as helping Google reduce dependence on Nvidia. Jane Street leading a round this size is a signal that AI infrastructure is now being underwritten as a contracted-cashflow asset, not a venture bet.