Anthropic is preparing to file its S-1 publicly as soon as the end of August, with backers targeting an October listing at a $2 trillion valuation or more and an offering size designed to match or top SpaceX’s $86.2 billion record, per Bloomberg reporting on August 20. SpaceX raised $75 billion at IPO and closed at $86.2 billion after overallotment in June, when it debuted at a $1.77 trillion valuation. Anthropic wants both records.
Citigroup is joining Morgan Stanley, Goldman Sachs and JPMorgan Chase on the underwriter roster, according to Bailey Lipschultz and Ryan Gould at Bloomberg. The company’s revolver, agreed at $2.5 billion last year, is expected to close above roughly $10 billion ahead of the public filing. That’s not a working-capital line. That’s a signaling instrument.
The revenue trajectory is the pitch. Anthropic’s annualized run rate crossed $65 billion by the end of July, a sevenfold jump from year-end 2025. Preliminary Q2 revenue landed above $11.5 billion against $787 million in Q2 2025, a roughly 14-fold year-over-year print. Internally, the company is forecasting $100 billion to $120 billion in annualized run rate by year-end.
The losses are the counterweight. Net loss ran to nearly $42 billion in 2025, roughly five times the $8.3 billion loss booked in 2024. CFO Krishna Rao is walking bankers through a company whose top-line growth curve now has to justify capex burn at a scale that not long ago belonged to sovereigns. Dario Amodei’s stake sits at around 2%.
The compute story sits underneath everything. TechStartups reported on August 21 that Anthropic’s three-year compute arrangement with SpaceX could be worth tens of billions, which puts the IPO’s would-be record-holder and its would-be record-breaker on the same capex ledger. Two companies, one compute stack, sequential trips to the same public market.
There’s political overhang the S-1 will have to disclose. The US Commerce Department imposed a temporary export control on Anthropic’s top Claude models in June, slowing revenue growth, and the Department of Defense earlier this year designated the company a supply-chain risk. Frontier AI has become a regulated export good, and Anthropic is asking the public market to price that in.
Zoom out and the frame gets sharper. Newly listed companies raised $160.6 billion through August 19, closing on the 2021 full-year record of $195.2 billion. A single Anthropic listing at SpaceX scale would clear that record on its own. The last comparable IPO cycle where a handful of names defined the tape ended in 2021, and the priors formed then, on unit economics and rate sensitivity, are the ones institutional allocators are dusting off now.
Rao’s job between now and October is to make a $42 billion loss read as investment rather than combustion. The syndicate’s job is to make sure the tape agrees.
Sources
- https://www.bloomberg.com/news/articles/2026-08-20/anthropic-expects-to-match-spacex-s-record-ipo-size-or-top-it
- https://www.bloomberg.com/news/articles/2026-08-20/anthropic-set-to-add-citigroup-to-top-ipo-banks-on-mega-listing
- https://www.bloomberg.com/news/articles/2026-08-17/anthropic-revenue-run-rate-surpasses-65-billion-ahead-of-ipo
- https://qz.com/anthropic-ipo-2-trillion-valuation-october-081326
- https://techstartups.com/2026/08/21/anthropic-eyes-2-trillion-valuation-in-ipo-that-could-top-spacex-as-biggest-ever/