Lambda seeks $4 billion private round ahead of planned 2027 IPO

AI computing cloud provider Lambda is raising up to $4 billion at a $14.5 billion pre-money valuation, a financing that could be its last private round before a planned initial public offering in 2027. Coatue Management and Blackstone are leading the round, The Wall Street Journal reported after reviewing a letter sent to investors.

The raise comes as Lambda’s reported backlog expanded from $15 billion in June to $50 billion in September. Much of that increase, however, is tied to a single customer commitment: Anthropic signed a $35 billion deal with Lambda in late August.

Backlog growth is concentrated in one agreement

The figures underline both the appeal and the risk in the neocloud model. Lambda supplies GPU capacity at a time when reliable access to those processors remains scarce, and a large contract with a major AI laboratory can materially increase the visibility of future demand.

At the same time, the change in Lambda’s backlog is heavily dependent on Anthropic’s commitment and its capacity to continue making payments. The reported valuation has increased substantially since Lambda’s 2025 funding round, making the size and concentration of contracted demand an important consideration for investors assessing the proposed financing.

Capital requirements remain central to the model

Demand is not the only issue for providers building AI infrastructure. Data-centre expansion is largely financed with debt, and Lambda raised an additional $1 billion of debt last week. That borrowing follows the chip-financing context in which Lambda’s billion-dollar Nvidia chip financing detailed Lambda’s $1 billion debt raise for Nvidia chips and Microsoft-related capacity, while the wider buildout requires providers to secure funding as lenders become more selective.

Raising private capital before a public listing can give Lambda more resources before the heightened scrutiny of public markets. The company was reportedly expected to list this year but pushed that timing back amid market uncertainty. If it proceeds with an IPO, it would join Nvidia-backed neoclouds CoreWeave and Nebius, whose ability to fund data-centre buildouts is now linked to the health of their shares.

IPO market context

The broader sector is also moving toward public markets. British neocloud Nscale filed for an IPO last month and is expected to begin trading soon. Lambda, Coatue and Blackstone did not immediately respond to requests for comment.

For businesses evaluating AI infrastructure suppliers, the practical implication is to distinguish headline backlog from diversified, financeable capacity: review customer concentration, debt commitments and the provider’s ability to build the GPU capacity required to deliver signed contracts.