Anthropic's long-awaited initial public offering is now expected to begin marketing in mid-October, according to a Reuters exclusive published Thursday, September 4, 2026, marking a delay from earlier timelines as the Claude maker positions itself for what could be one of the largest public offerings ever.
The Reuters report, citing sources familiar with the matter, lands alongside Financial Times reporting that Morgan Stanley and Goldman Sachs are close to being awarded the top roles on the deal, which the newspaper characterized as a "$2tn IPO." As we noted in our August coverage of the IPO's risk factors, the offering is widely expected to raise on the order of $100 billion — a sum that would reshape the IPO record books in its own right. For continuous coverage of the deal and the market around it, follow our AI industry coverage.
A Later Timeline Than Investors Expected
According to Reuters, the marketing launch — the point at which the company and its bankers begin gauging demand from institutional investors — has shifted toward mid-October. Syndicated summaries of the Reuters report indicate the prospectus is now expected toward the end of September, with the roadshow to follow in mid-October.
The delay matters for timing as much as optics. An October marketing window would put the listing itself in the final stretch of 2026, in a market that has spent the year swings between AI enthusiasm and anxiety over whether the sector's spending can be recouped.
A $2 Trillion Price Tag Would Rewrite the Record Books
The Financial Times' characterization of the deal as a "$2tn IPO" aligns with how other outlets have read the company's private-market ambitions. The Times of India reported the offering as targeting a $2 trillion valuation with a mid-October market debut, while crypto-finance outlets CoinGape and Cryptonews.net framed the same number as a bid to overtake SpaceX as one of the most valuable private companies to transition to public markets.
For context on how the company's financial picture has evolved: AI Buzz Wire reported in mid-August that Anthropic's IPO valuation debate hinged on internal revenue forecasts of $190-200 billion for 2028, figures that raised eyebrows even among bullish analysts. A $2 trillion valuation would imply investors underwriting that entire forecast — and then some.
The Banks and the Backers
If the Financial Times' reporting proves correct, the mandate will split in a familiar way for a deal of this size, with Morgan Stanley and Goldman Sachs — two of the three banks that have long dominated mega-IPOs — close to taking the lead left and right positions. Neither bank has publicly commented, and Anthropic has not confirmed its banker lineup.
The FT also published a separate investigation this week into what it called Google's "$200bn Wall Street finance machine" supporting Anthropic, examining the web of financing arrangements that connects the search giant, Wall Street, and the AI lab it backed. Google's investment in Anthropic has been one of the defining features of the AI funding landscape, and the depth of that financial plumbing is likely to draw scrutiny as the S-1 process brings previously private arrangements into public view.
What to Watch Next
Three markers will signal whether the timeline holds. First, the prospectus filing: a public S-1 toward late September would confirm the October marketing window. Second, the banker lineup: confirmation of Morgan Stanley and Goldman in the lead roles would set the syndicate for a deal whose fees alone will be enormous. Third, and most consequential, the valuation range printed in the prospectus — the difference between a $500 billion IPO and a $2 trillion one is the difference between a very large offering and the largest in history.
The risks have not gone away. As our earlier reporting noted, the company itself is expected to flag AI backlash and regulatory exposure among the risk factors in its filing, and the valuation ultimately stands or falls on revenue that has yet to be earned. What changed this week is simpler: the market now has a date to argue about.
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