September 7, 2026 09:00 AM PST
(PenniesToSave.com) – Most American households will never get a phone call from an investment bank offering shares in an initial public offering. That does not mean they have no position. If you hold an S&P 500 index fund inside a 401(k), an IRA, or a target date retirement fund, you already own pieces of Amazon, Microsoft, and Nvidia, and all three have put money into the artificial intelligence company Anthropic [2]. Understanding how index funds and ETFs actually hold their positions is the first step toward seeing what you are carrying.
Anthropic submitted a confidential draft registration statement to the Securities and Exchange Commission in June [2][3]. The Information reported that the company plans to publish its prospectus after the Labor Day holiday, with a listing possible as soon as late September or October [3]. Invezz, citing the Financial Times, reported that the filing could arrive as early as this week [4].
Here is the part worth holding onto before the headlines start arriving. Almost every number circulating about this company came from the company itself. None of it has been audited by an outside firm or filed under penalty of law. The prospectus will be the first document Anthropic is legally obligated to get right.
Disclosure: this newsletter is produced with assistance from Anthropic’s Claude models.
Quick Links
- What Is Anthropic Actually Selling?
- How Fast Is the Revenue Actually Growing?
- Where Does Amazon Fit Into This?
- Who Else Has Money on the Table?
- What Do the Margins Say About Whether This Works?
- What Should You Watch When the Filing Lands?
What Is Anthropic Actually Selling?
Anthropic builds advanced artificial intelligence models and assistants, then sells access to them [1]. The best known is Claude, and the fastest growing piece of the business is Claude Code, a version aimed at software developers. That product passed a USD 2.5 billion annualized run rate back in February [1].
The customers here are mostly not households. Harrison Rolfes, a senior analyst at PitchBook who has been covering the company on its road to going public, says enterprise business accounted for roughly 80 percent of revenue, and that more than 1,000 customers were spending over USD 1 million on an annualized basis as of April [1]. Rolfes describes that revenue as repeatable but not necessarily contractual [1].
That distinction carries weight. A software company with signed seat licenses knows roughly what it will collect next quarter. A company billing by usage collects whatever its customers happen to consume, and consumption can move in either direction. Rolfes expects the model to shift over time toward pricing per completed task, on the reasoning that a financial services firm using Claude has no reason to pay for medical vocabulary it will never touch [1]. That is his forecast, not company policy.
For anyone evaluating this business, the practical takeaway is that Anthropic’s fortunes ride on how much other corporations decide to spend on AI in a given month. That is a different risk profile than a consumer brand collecting millions of small, predictable payments.
How Fast Is the Revenue Actually Growing?
The reported growth is genuinely unusual. Second quarter revenue exceeded USD 11.50 billion, up from USD 4.73 billion in the first quarter and USD 787 million a year earlier [1]. Rolfes says adjusted operating income has turned positive, which he describes as unprecedented for a company in this sector [1].
The annualized revenue run rate, which projects a recent pace across a full year, passed USD 30 billion in April, more than triple where it stood entering the year [3]. By the end of July it reached USD 65 billion, a figure Anthropic was telling prospective investors and that CNBC reported in mid August [3]. Rolfes notes that the USD 65 billion figure represents roughly one third of the company’s own 2028 projections, which suggests it is tracking toward the targets it has stated publicly [1].
Now the caveat that governs everything above. A run rate is a projection, not a result. It takes a recent stretch of sales and multiplies it out. And because Anthropic is still private, none of these figures have been audited or filed with a regulator.
“Nearly everything the market knows about Anthropic’s finances today is reported, not filed.”
Daniel Sparks, The Motley Fool [3]
Anyone who has watched a fast growing company’s story run ahead of its books recognizes the shape of this moment. The numbers may well hold up. They simply have not been checked yet by anyone with a legal duty to check them.
Where Does Amazon Fit Into This?
On April 20, Anthropic committed to spend more than USD 100 billion with Amazon Web Services over the following ten years [3]. The agreement covers up to 5 gigawatts of computing capacity running on Amazon’s own silicon, including Graviton processors and Trainium2 through Trainium4 chips, with an option on future generations [3].
That promise shows up in Amazon’s filings. AWS reported a backlog of contracted work, meaning customer commitments longer than one year that have not yet been recognized as revenue, of about USD 496 billion as of June 30 [3]. That was up from roughly USD 364 billion in March and about USD 195 billion in mid 2025 [3]. Sparks calculates the Anthropic deal at close to a fifth of that total, and notes that AWS has now disclosed more than USD 200 billion in multiyear commitments from just two private AI companies [3]. The contracts are also stretching out. The weighted average remaining life of the segment’s long term agreements moved from 4.0 years to 6.4 years over twelve months [3].
Amazon’s own side of the ledger looks strong. Second quarter AWS revenue rose 37 percent year over year to USD 42.2 billion, the segment’s fastest growth in 18 quarters, with segment operating income up about 63 percent to USD 16.6 billion [3]. Amazon is also a funder, not merely a supplier. It made an early USD 8 billion investment, added USD 5 billion in April along with a further USD 20 billion contingent on unspecified commercial milestones [2], and its latest quarterly filing shows another USD 10 billion this year with up to USD 15 billion more available under a financing arrangement tied to compute delivery milestones [3].
A backlog is signed work, not banked revenue. Amazon itself says recognition depends on customer usage and its own performance under the contracts [3]. Sparks frames the arithmetic honestly: spread evenly, the commitment runs more than USD 10 billion a year, roughly 6 percent of AWS’s current annual revenue pace, which is affordable if Anthropic’s growth holds and heavy if it does not [3].
Who Else Has Money on the Table?
Amazon is the largest visible backer, but it is not alone. Microsoft and Nvidia have both taken stakes in Anthropic, though the amounts have not been disclosed in public reporting [2]. Anthropic’s private valuation reached USD 380 billion in April and climbed to USD 965 billion in a Series H funding round shortly afterward [2].
There is a pattern in these arrangements that deserves a plain reading. The headline numbers are enormous, and the portion actually committed today is considerably smaller. Amazon’s additional USD 20 billion depends on commercial milestones neither company has described [2]. The USD 15 billion financing line is tied to compute delivery milestones [3]. Any figure that folds in the contingent portion should say so in the same breath, because the conditional money and the wired money are not the same thing.
On the underwriting side, reports indicate Morgan Stanley will take the lead left role and Goldman Sachs will serve as stabilization agent, with Barclays and JPMorgan also participating [4]. Invezz estimates the syndicate will share over USD 500 million in fees, and notes that the banks on the recent SpaceX offering divided a pool of about the same size, with Goldman Sachs and Morgan Stanley taking roughly USD 100 million each [4]. Those figures come from Invezz without an underlying source, so treat them as an estimate rather than a disclosure.
The common thread for ordinary savers is that Amazon, Microsoft, and Nvidia are all large cap index constituents. The exposure is diffuse, it is real, and no individual investor chose it.
What Do the Margins Say About Whether This Works?
What customers pay is public. Claude Opus 5 lists at USD 5 per million input tokens and USD 25 per million output tokens, while Fable 5 lists at USD 10 and USD 50 [1]. Rolfes calculates that at Opus 5 list pricing, customers pay roughly 0.0033 cents per generated word [1].
What it costs Anthropic to deliver that is not public. Rolfes describes the difficulty of pinning down compute expense, inference costs, failure rates, how much power the chips draw, how long a model takes to produce an answer, and then spreading all of it across everyone using the service [1]. He has published an estimate putting Anthropic’s gross margin near 44 percent, and states that servicing commitments extending into the 2030 through 2032 range would require pushing that figure closer to 70 percent [1]. For scale, Microsoft and ServiceNow both run gross margins near 70 percent [1]. These are Rolfes’s estimates built on incomplete information, not company disclosures.
“The path to margin expansion becomes a major part of the IPO thesis.”
Harrison Rolfes, PitchBook [1]
The counterargument deserves a fair hearing. Rolfes also argues Anthropic can outrun falling token prices if usage grows faster than prices decline, pointing to July production data from the software firm Vercel showing token volume up 59 percent and spending up 37 percent even as the average price per token fell 13.6 percent [1]. He frames this as the Jevons paradox, the observation that cheaper access often produces more total spending, not less [1].
Underneath both arguments sits the same constraint. Rolfes notes that reaching larger markets such as financial services and healthcare would mean multiplying the customer base, and the computing capacity to serve it has to be purchased first [1].
What Should You Watch When the Filing Lands?
The prospectus replaces reported estimates with audited financial statements: actual revenue, actual profit or loss, and actual cash [3]. Invezz notes it also enables the roadshow, where management makes its case directly to institutional investors [4].
Several specific items are worth looking for. Rolfes has said gross margin is his primary focus, alongside customer concentration, meaning how much revenue comes from the largest handful of customers [1]. He also wants user retention and contract duration figures, which together determine how much of this revenue is genuinely recurring, and says the numbers circulating now are inconsistent [1]. Sparks adds a fourth item that matters to Amazon shareholders in particular: Anthropic’s own accounting of the purchase commitments that swelled the AWS backlog [3].
On valuation, the reporting diverges. People familiar with the matter told CNBC the company could go public at about USD 2 trillion, roughly double its private market value [3]. Bromels, writing for The Motley Fool, projected a post IPO market capitalization above USD 1 trillion [2]. Both figures are projections from outside the company, and they are far apart.
For most readers, the practical step has nothing to do with buying shares at the offering. The first day price is not the number that affects your household. What matters is whether the funds you already own carry more concentrated AI exposure than you realized. Pull up the top ten holdings in your index funds and target date funds. If you are not sure where to find them, a walkthrough of how retirement accounts are structured and where to review your holdings is a reasonable place to start.
Final Thoughts
Two things are true at once here, and the temptation is to pick only one. The growth is real and partly documented in Amazon’s regulatory filings, which are audited and enforceable, including a backlog that reached about USD 496 billion by the end of June [3]. The costs are also real, and the question of whether the margins support the commitments has not been answered by anyone under an obligation to be right.
A company that raised money privately for years never had to open its books. Enthusiasm and disclosure are not the same thing, and the gap between them is where ordinary investors have historically gotten hurt. The prospectus closes that gap for the first time. That is not cause for alarm and it is not cause for excitement. It is cause to read the document, or at least to read what serious people say after they have read it.
Whatever happens on listing day, the exposure most households carry is indirect, already held, and worth understanding before the coverage arrives. If this is the moment you start paying closer attention to what sits inside your portfolio, a grounding in how new investors should approach market volatility will serve you better than any single headline about a valuation.
Works Cited
[1] Lauricella, Tom. “How Anthropic Makes Money and What Investors Should Know Ahead of Its IPO Filing.” Morningstar, 4 Sept. 2026, global.morningstar.com.
[2] Bromels, John. “Anthropic Could Be the Next Mega IPO: 2 Magnificent Stocks That Already Own a Piece of the AI Unicorn.” The Motley Fool, 5 Sept. 2026, finance.yahoo.com.
[3] Sparks, Daniel. “Anthropic Has Committed More Than $100 Billion to AWS, and Its Prospectus Could Reveal More Details About This Contract.” The Motley Fool, 6 Sept. 2026, fool.com.
[4] “More Details of the Mega Anthropic IPO Are Coming Out: Here’s What We Know.” Invezz, 6 Sept. 2026, tradingview.com.