Nasdaq wins Anthropic's listing, aimed at October

The whole report is one word long: Nasdaq. Business Insider says Anthropic has picked the exchange for its potential IPO, Reuters relayed that on September 13, and the size, the price and the exact date are all still open.

At a glance

• Anthropic has settled on Nasdaq for its potential listing, the one decision the reporting actually names, and the debut is still pointed at October rather than any later window.
• By Tracxn's count Anthropic has raised 132 billion dollars across 18 rounds, while a separate industry estimate puts the total closer to 144 billion dollars as of May 2026.
• Everything that decides what the offering is worth stays unset: the number of shares, the price range and the day itself, which is expected only days before the November midterms.

If you have not followed the paperwork, Anthropic said it confidentially submitted a draft Form S-1 to the SEC for a proposed offering of common stock, which leaves it the option to go public once the review is finished. The company added that the number of shares and the price were not set. The Nasdaq choice is the first piece of the plan to surface since.

Nasdaq is the only decision the reporting names

Business Insider reported the exchange choice and Reuters carried the report on September 13. The October target is not new: Anthropic has been aiming at an October listing, and sources earlier said the marketing would not start before mid-October, with the debut landing a few days ahead of the November midterms.

What the report does not do is fill in the rest. No share count, no price range, no date beyond the October target. For a company whose last private round was measured in tens of billions of dollars, the reporting covers exactly one line item: where the stock will trade.

Tracxn counts 132 billion dollars raised across 18 rounds

That is Tracxn's tally of everything Anthropic has taken in, spread over 2 early-stage rounds, 14 late-stage rounds, one other and one debt round. A separate industry estimate puts the total nearer 144 billion dollars as of May 2026.

The ladder is steep. Tracxn's records show a 13 billion dollar Series F at a 183 billion dollar post-money valuation on September 2, 2025, a second Series F of 10 billion dollars at 350 billion on January 27, 2026, a 30 billion dollar Series G at 380 billion on February 12, 2026, and a 65 billion dollar Series H at 965 billion, dated April 21, 2026.

According to a tally published by Pinggy, that Series H closed on May 28, 2026 and briefly made Anthropic the most valuable private company in the world, ahead of OpenAI, which the same tally puts at an 852 billion dollar post-money valuation after a 122 billion dollar round in March 2026.

Where is the revenue in all this?

Growing fast, by one account. Pinggy's tally puts Anthropic's annualized revenue at 47 billion dollars in May 2026, up from 14 billion dollars in February 2026, more than tripling in three months.

The strategic money sits at a similar scale. The same tally has Amazon committing up to 33 billion dollars in total and Google up to 43 billion dollars in total, including a 10 billion dollar investment in April 2026. Tracxn lists the Series H as led by Altimeter Capital, Dragoneer, Greenoaks, Sequoia Capital, Capital Group, Coatue, D1 Capital Partners, GIC, Iconiq Capital and Xn Ventures, with Amazon, Blackstone, Fidelity and sovereign funds including MGX and Temasek also taking part.

Why file the S-1 confidentially?

Because the confidential route lets the SEC read the draft before anyone outside does. Anthropic said it submitted its draft Form S-1 that way: the regulator reviews it, sends comments back, the company revises, and no public document is in circulation while that happens.

Think of it as sending a draft to an editor before you publish rather than after. Only when the review is done does the company flip to a public filing, and only then do the numbers get attached: how many shares, at what price, on what day. The marketing to investors sits between those two steps.

The gap between the venue and everything else is what stands out. The valuation and revenue figures here come from private-market trackers rather than a public filing, and Anthropic's own statement says the share count and the price have not been set, so the number that decides the whole offering is still missing. Oddly, for a listing this size, the exchange is the part that got settled in public first.

When the October window opens

Marketing is not expected before mid-October, and the debut has been described as landing a few days ahead of the November midterms, which leaves a narrow stretch of days for pricing. Watch for the public version of the S-1: that is where the share count, the price range and the underwriters finally appear. Until then, no date has been confirmed, and Anthropic has said only that it may go public after the SEC review completes.