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Artificial intelligence companies are spending hundreds of billions of dollars to build the infrastructure needed to train and operate their models. And the companies supplying that infrastructure are making a fortune.

Now they're helping finance one of their biggest customers.

Anthropic disclosed in an updated IPO prospectus Tuesday that seven technology companies, including Nvidia (NVDA -5.02%), Alphabet's (GOOG -0.09%) (GOOGL +0.06%) Google, and Micron Technology (MU -2.96%), have agreed to purchase a combined $26 billion in its stock when it goes public. CNBC reported the company is seeking to price on Nov. 18 and begin trading on the Nasdaq exchange Nov. 19.

While $26 billion sounds like a lot of money, it's a relatively small amount compared to what Anthropic has committed to spending on computing infrastructure over the next two decades. But it raises a question for investors: How much of the AI industry's extraordinary growth depends on its biggest customers continuing to raise money?

Image source: Getty Images.

The companies supplying Anthropic are also investing in it

Anthropic's latest filing provides a breakdown of the investments, which will take place through a private placement immediately following its IPO.

According to the filing, Nvidia and Google are each committing $10 billion. Advanced Micro Devices (AMD +3.78%) is investing $2.5 billion, and Micron, Broadcom (AVGO +2.63%), and Microsoft (MSFT -0.48%) each have pledged to contribute $1 billion. TSMC Partners, an affiliate of Taiwan Semiconductor Manufacturing (TSM +2.00%), will invest $500 million.

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Key data points

Market capMarket cap calculated using publicly traded shares outstanding only. Does not include unlisted, private, or dual-class non-traded shares. Implied market cap may vary.$3.52T

Day's range$287.22 - $292.02

52wk range$270.70 - $408.61

Volume10.3M

Avg volume29.1M

Gross margin60.86%

Dividend yield0.30%

These companies will receive nonvoting Class N shares at the same price paid by IPO investors. The offering is expected to be priced between $70 and $78 per share.

The investments are contingent on the IPO being completed and other conditions being satisfied.

There's an obvious business rationale here. Anthropic needs enormous amounts of computing power, and these companies either supply the chips and equipment required to provide that capacity or operate the cloud infrastructure supporting its AI models.

By investing in Anthropic, they're getting an ownership stake in a customer that could generate substantial revenue for years to come.

But they're also helping that customer pay its bills.

Anthropic's spending commitments dwarf the investments

The updated prospectus shows that Anthropic's computing and infrastructure commitments increased slightly, from $895.4 billion in its previous filing to $900.9 billion now. About $451.6 billion is expected to be incurred by the end of 2030, with most of the remainder extending through 2045. The company said $70.7 billion is due by the end of September 2027.

The AI start-up generated $33.2 billion in revenue during the first nine months of 2026, including $17 billion in the third quarter alone. Its rapid expansion helps explain why so many technology companies want a piece of its business.

The $26 billion private placement represents less than 3% of Anthropic's total infrastructure commitments.

What this means for investors

There's nothing inherently wrong with a supplier investing in a customer. In fact, these arrangements can make a lot of sense when both companies benefit from a long-term relationship.

But they also introduce an additional risk. If Anthropic continues to grow rapidly and successfully finances its expansion, its suppliers could benefit from both increased sales and appreciation of their Anthropic investments.

If financing becomes more difficult, however, Anthropic could face pressure to slow its infrastructure expansion. That could affect the companies expected to supply the equipment and services supporting Anthropic's growth.

The investments outlined in Anthropic's filing are best viewed as a vote of confidence from companies with a financial interest in its success. For shareholders of big tech companies like Nvidia, Alphabet, and Micron, the more important issue isn't whether their companies can afford these investments. It's whether Anthropic can continue generating the revenue and raising the capital necessary to support its enormous spending plans.