There is a number in Anthropic's forthcoming IPO pitch that no auditor will ever sign off on, no accounting standard defines, and no regulator will check. It is also the largest such number any company has ever put in front of investors: more than $30 trillion.
That is the total addressable market Anthropic is expected to present to prospective buyers ahead of its listing, according to The Wall Street Journal. It edges past the $28.5 trillion SpaceX claimed before its record June debut and sits within shouting distance of annual U.S. GDP, currently around $32.5 trillion — roughly a quarter of the $126 trillion the world is projected to produce this year.
TAM is not a forecast. It is the ceiling — the revenue a company would book if it captured every dollar of a market and left nothing for anyone else. Uber cited $6 trillion in 2019 by valuing every mile driven by every personal car and bus on earth. WeWork claimed $3 trillion by multiplying 255 million desk workers across 280 cities by roughly $11,700 in annual occupancy cost each. The construction is always a population times a per-unit price. What changes is the unit.
The unit is the story
Anthropic's method is what makes the figure novel rather than merely large. Instead of sizing enterprise software, cloud, or AI subscriptions, the company is reportedly basing its estimate on the full scope of work AI models could complete — legal drafting, accounting, engineering, customer operations, coding, business process outsourcing. Traditional software made workers faster. Anthropic's argument is that Claude does the task instead.
"With things like Claude and the way it writes code, you could argue it's replacing the work that humans do end-to-end, and so the TAM for those products is essentially the labor market for that work output," Alex Brunicki, co-founder and general partner at Backed VC, told Fortune.
That redenomination is the whole trick. Uber measured transportation spending, WeWork real estate spending, SpaceX a forecast of the AI market. All three counted money that already changes hands. Anthropic is counting work, which is not a market — it is an input that shows up on the buyer's income statement as payroll. The ILO puts labor's share of global income near 52 percent, implying roughly $66 trillion in annual wages, salaries and self-employment income worldwide. A $30 trillion claim is therefore something like 45 cents of every dollar the planet pays for human effort.
The skeptics arrived quickly. "Another way of looking at absurdity of the $30 trillion addressable market claim: annual U.S. GDP is currently $32.5 trillion," wrote Fred Hickey, the tech analyst who edits the investment newsletter The High-Tech Strategist, on X. "And yet this nonsense (wild proclamations and predictions) is allowed to continue so that Wall St. & Silly-con-Valley can extract as much money from unwitting 'investors' as possible, before the inevitable stock market bubble collapses." NYU valuation professor Aswath Damodaran, asked about SpaceX's near-identical figure earlier this year, called it "reaching the end of what's plausible and pushing beyond."
The business underneath
None of which means Anthropic is a paper company. Revenue more than doubled to $11.6 billion in the second quarter, from $4.73 billion in the first. Annualized run rate went from roughly $9 billion at the end of 2025 to more than $47 billion in May and past $65 billion by July, according to Bloomberg — a seven-fold move inside seven months. It has reportedly booked a first quarterly operating profit, and over 1,000 enterprise customers now spend more than $1 million a year.
Bankers are pricing the deal off none of that. Reuters reported Anthropic is projecting 2028 revenue of roughly $190 billion to $200 billion, and that the listing is being valued on enterprise-value-to-revenue multiples applied to that 2028 figure rather than to current results. At a $2 trillion valuation, a $195 billion forecast is about 10x forward revenue — an unremarkable software multiple. Against the July run rate it is 31x. Against annualized Q2, 43x.
Why It Matters
Do the division and the TAM's function becomes obvious. Anthropic's own 2028 forecast is 0.65 percent of the $30 trillion it is claiming. Measured against the $2.4 trillion in combined revenue that all 191 tech companies in the S&P 1500 booked last year, per FactSet, the same forecast would be 8.1 percent of the entire listed U.S. tech sector — a claim that instantly invites a list of competitors, switching costs and price wars. Identical forecast, two completely different conversations. The bigger denominator turns a hard question about growth rate into an easy-sounding question about market share.
The deeper problem is that a TAM denominated in wages and revenue collected in tokens move in opposite directions by construction. The more work AI absorbs, the cheaper each unit of that work gets. Payments firm Ramp, analyzing 70,000 U.S. businesses, found the cheaper Claude Opus 5 overtaking Anthropic's flagship in enterprise spend within weeks of launch. "Most people don't need to operate at the frontier," said Miles Clements of Accel, an Anthropic investor. Open-weight models reportedly account for a majority of token usage industry-wide. Customers are buying more work than ever; Anthropic captures only the price it can charge for it. That gap is the entire distance between $30 trillion and $195 billion.
Brunicki's read is that professional money will treat the figure as a mission statement, not a model. "Sophisticated investors are going to build their own cash-flow models," he said. Retail buyers are likelier to take it at face value.
What to watch
The most revealing test is procedural. A TAM in a roadshow deck is marketing; a TAM in a registration statement is a forward-looking statement, and the safe harbor Congress built for those explicitly does not apply to IPOs. Whether the $30 trillion figure survives into the prospectus — or stays in the deck, or arrives footnoted and sourced to third-party research — will say something about the conviction behind it. Anthropic's filing is expected within weeks. Worth remembering: SpaceX's record TAM did not stop its stock from trading below its $135 offer price within eight weeks. A number too large to be falsified is also too large to offer support when the price falls.
“With things like Claude and the way it writes code, you could argue it's replacing the work that humans do end-to-end, and so the TAM for those products is essentially the labor market for that work output.”— Alex Brunicki, Co-founder and General Partner, Backed VC