Anthropic's IPO Filing Shows Risky Compute Financing

TL;DR: Anthropic's IPO filing puts a price on the ambition behind Dario Amodei's phrase "a country of geniuses in a data center." Fortune reports that the company has pledged to spend $895.4 billion on computing stretching out to 2045. The filing also shows how some of that bill gets paid, and the mechanics carry more risk than the headline revenue growth suggests.

What did the filing reveal about how Anthropic pays for compute?

It reveals two arrangements, both tied to Broadcom. In a $63 billion transaction announced Oct. 26, Bank of America, Citi, Morgan Stanley and Blackstone will finance a newly formed company that buys Broadcom chips and networking equipment and leases them to Anthropic, according to Fortune. Deliveries are expected to begin in 2027.

The second arrangement is a March 2026 agreement. Under it, Anthropic can issue up to $42 billion in convertible notes to Broadcom to cover eligible quarterly rent, which preserves cash it would otherwise pay out. Our earlier read of the leaked prospectus covers the losses that make that cash so valuable.

How does the Broadcom backstop work?

Broadcom has agreed to absorb losses if Anthropic defaults on its lease, with maximum potential liability of about $43 billion once the equipment is deployed, per Fortune. Broadcom covers the gap between 72.5% of what is still owed and what the equipment sells for.

Fortune gives a worked example. If $100 remains owed and the equipment sells for $60, Broadcom pays $12.50. Think of it as a floor under the resale price: Broadcom fills the space between what the equipment fetches and 72.5% of the debt, and nothing above that line. The supplier is also the guarantor, which ties Broadcom's balance sheet to its own customer.

Why do the convertible note terms matter to shareholders?

The terms change depending on whether Anthropic meets specified revenue conditions, and that is where existing shareholders can get diluted. Fortune says notes under the facility normally carry 9% interest, with the interest added to the debt, and convert to stock at 90% of the market price. The table shows what happens when the conditions are missed.

Term	Revenue conditions met	Revenue conditions unmet
Interest rate	9%, added to the debt	13%
Conversion price	90% of market price	85% of market price
Effect on shares	Fewer shares issued per dollar	More shares per dollar, further dilution

Source for all rows: Fortune. A lower conversion price hands noteholders more shares for each dollar, so a bad quarter costs current owners twice, in interest and in ownership.

How big is the bill compared with the cash on hand?

An amended filing lists about $895 billion of commitments, nearly all for computing and data centers, according to Yahoo Finance. About $70 billion comes due within a year. The full bill is almost seven times the roughly $132 billion in cash and short-term investments Anthropic held at the end of September.

The same report says Anthropic booked a $567 million operating loss in the latest quarter, one quarter after its first operating profit of $974 million. Revenue was about $17 billion. Our earlier read of the compute bill near $900 billion covers the commitment schedule. The financing terms above are the part that schedule does not show.

Reported figures also differ by date. Reuters, via CNBC, cited a $518 billion obligation from the earlier prospectus, and the amended filing is larger. Use the latest filing for any number you rely on.

What is still not disclosed?

The filing is preliminary. Ilan Strauss and Tim O'Reilly of the AI Disclosures Project write at TechPolicy.Press that Anthropic has not yet filed the contracts to buy computing power from Amazon, Google and Microsoft, despite SEC rules requiring disclosure of contracts a business substantially depends on. The SEC can ask for more.

Common mistakes

The first is reading the lease guarantee as safety for shareholders. It protects the lenders and the equipment owner, and it stops at a formula. Shareholders sit behind all of it, after every lender and lessor has been paid.

The second is treating the valuation as a price you can buy at. Reuters, via CNBC, reports the sale could value the company at more than $2 trillion, against its own estimated $965 billion in May.

The third is mixing numbers from different filings. The May valuation, the September obligations and the November commitments describe different dates. Check the date first.

If you want to see how lenders price AI infrastructure debt directly, the guide to infrastructure debt investing covers it. For what the filing says about leadership pay, see the breakdown of Dario Amodei's pay.

FAQ

Who controls Anthropic after the IPO?

According to TechPolicy.Press, the seven founders will hold 50.1% of the votes on general shareholder matters. The Long-Term Benefit Trust, an independent body of five trustees, will select four of the seven directors.

How much of Anthropic's revenue comes through cloud partners?

More than 40%, per TechPolicy.Press. It flows through the cloud marketplaces of Amazon, Google and Microsoft, the same companies whose computing contracts have not yet been filed.

Where can I read the filing myself?

On SEC EDGAR, where Anthropic, PBC is listed under CIK 2130357, per TechPolicy.Press. The original S-1 and its amendments sit side by side, so check which version a number comes from.

What to do today

When the next amendment to the S-1 is posted on SEC EDGAR, open the section on the Broadcom facility and find the revenue conditions that trigger the 13% notes. Write those thresholds down and compare them with the latest quarterly revenue before you form a view on the offering. If you want this kind of filing read for you each week, sign up for the free AIN briefing.

Educational content only. Not investment, tax, or legal advice. Not an offer or solicitation to buy or sell securities. Past performance does not guarantee future results. Private-market investments are illiquid and involve risk of loss, including total loss of capital. Consult qualified advisers. Angel Investors Network is not a broker-dealer or investment adviser.