Lambda Labs pursues a $4 billion IPO backed by a $50 billion backlog of AI infrastructure orders.

Lambda is raising up to USD 4 billion at a USD 14.5 billion pre-money valuation as it prepares for a possible 2027 initial public offering. Coatue Management and Blackstone are leading the proposed financing, according to The Wall Street Journal.

The company's contracted business has expanded sharply as demand for artificial intelligence computing capacity continues to rise. An investor letter reviewed by the Journal showed Lambda's backlog reached USD 50 billion in September, up from USD 15 billion in June—a USD 35 billion increase in three months.

Much of that growth came from a single customer. Anthropic signed a USD 35 billion commitment with Lambda in late August, matching the entire increase in backlog between June and September. The arrangement gives Lambda a major long-term customer while concentrating a substantial portion of future contracted demand to one company.

As access to advanced graphics processing units remains limited, AI developers require large volumes of computing capacity to train and operate increasingly complex models. That demand has supported rapid growth among neocloud providers, which specialize in supplying high-performance computing infrastructure designed for artificial intelligence workloads.

Unlike software businesses, GPU cloud providers must continually spend on physical infrastructure as customer demand grows. Building AI computing facilities requires GPUs, networking systems, power equipment and data center capacity. The latest AI accelerators can require substantial upfront investment, forcing Lambda to secure hardware and supporting infrastructure before delivering the computing capacity covered by major customer contracts.

Lambda recently raised an additional USD 1 billion in debt financing to support data center construction and infrastructure investments. Debt financing has become an important part of the expansion model, though lenders have grown more selective about which infrastructure projects receive funding and under what terms. The proposed USD 4 billion equity round could provide greater financial flexibility and reduce reliance entirely on additional borrowing.

Lambda had initially planned to pursue an IPO sooner but pushed the expected listing into 2027 amid uncertainty in financial markets. Raising additional private capital gives the company more time to expand before public investors assess its financial performance. Public markets typically place closer attention on debt, profitability, customer concentration and capital spending.

Lambda would join several infrastructure companies that have already moved toward public markets. CoreWeave and Nebius have entered public markets, while British neocloud provider Nscale filed for an IPO last month. Public listings can provide AI infrastructure companies with additional capital to support new data centers, GPU purchases and capacity investments, though listed companies also face continuing scrutiny over how much capital they spend to generate growth and how heavily they depend on major customers.

Lambda's USD 50 billion backlog provides substantial contracted demand as it prepares for that transition, with Anthropic's USD 35 billion commitment representing a major share of that total.