Anthropic, a prominent artificial intelligence laboratory, is preparing for what could be one of the largest initial public offerings (IPOs) in history. According to its prospectus, the company intends to spend over $800 billion on computing infrastructure between now and 2045. To fund such ambitious goals, Anthropic relies heavily on its ability to secure investment-grade credit ratings, which allow a company to borrow capital at lower interest rates from a broader pool of institutional lenders, including many insurance and pension funds that are legally restricted from holding debt in junk-rated entities.

However, Blackstone—a private capital firm acting as an anchor investor in Anthropic’s latest $63 billion chip financing deal (known as "Project North Star")—has recently signaled a shift in expectations. While Blackstone previously suggested to its investment partners that Anthropic might achieve an investment-grade rating by the end of the year, it now indicates that a rating in the "double B" range or higher is more likely. This shift suggests that major credit rating agencies may view the startup's financial profile as too speculative for a top-tier rating immediately following its public debut.

This potential lack of an investment-grade rating creates a significant hurdle for Anthropic’s long-term financing strategy. Because many large-scale investors are barred from lending to junk-rated borrowers, Anthropic may be forced to rely more heavily on suppliers with high credit ratings to guarantee its debt. For example, in the current North Star deal, more than $42 billion of senior loans are guaranteed by Broadcom, a company with an investment-grade rating. While the junior debt—where Blackstone’s funds have invested $9 billion at yields exceeding 10%—is backed by Anthropic’s own lease payments, the company's ability to independently raise massive amounts of capital without such third-party guarantees may be limited if it remains in the junk category.

A conceptual representation of financial investment and debt structures.
Blackstone's funds have invested in $9 billion of junior debt at yields exceeding 10%.wallhop.io

The image relates to the specific financial structure of the North Star deal involving Blackstone's investment in junior debt.