Anthropic has invited a group of institutional investors to a pre-IPO investor day at its San Francisco headquarters on October 14, where attendees will get to question company executives directly, Bloomberg reported Oct. 1, citing people familiar with the matter. According to the timeline described in the report, the formal roadshow is expected to launch as early as the week of November 9, with the goal of beginning trading before Thanksgiving (Nov. 26).
Potential investors are reportedly anticipating a valuation range of $1.8 trillion to $2 trillion. An Anthropic spokesperson declined to comment, and the report notes that the arrangements haven't been formally announced, so both the timing and the valuation could still change.
The timeline is falling into place
String together this year's milestones, and the company looks closer to going public with each one:
- June 1: Anthropic confidentially filed a draft S-1 with the U.S. Securities and Exchange Commission;
- September 11: Reuters reported the company planned to raise as much as $100 billion, with Nvidia considering an anchor investment of up to $10 billion;
- September 19: Reuters reported the IPO could be pushed to after the U.S. midterm elections in early November;
- October 1: Bloomberg reported the investor day date had been set.
The week of November 9 falls right after the midterms, lining up with Reuters' report last month. Under SEC rules, companies that file confidentially must make their S-1 public at least 15 days before the roadshow begins — working backward, that means the prospectus should surface by late October at the latest. That's when figures on revenue, losses and compute contracts, so far known only through sourcing attributed to people familiar with the matter, will be disclosed under the company's own name for the first time.
What investor day is likely to cover
An investor day is narrower in scope than a roadshow and runs more like a closed-door Q&A. Based on recent public reporting, a few topics are hard to avoid.
First, revenue mix. Bloomberg's report drew a contrast between Claude and ChatGPT: Claude is less of a household name among everyday consumers, but it's embedded more deeply in enterprise workflows at banks, hedge funds and companies like Salesforce. A customer base weighted toward enterprise is seen as a steadier driver of revenue growth. That assessment currently rests on reporting rather than any public financial disclosure.
Second, security incidents. The report flagged that recent hacking-related episodes could create friction for the offering. In an August disclosure from the UK AI Safety Institute, 17 of 19 documented cases of the AI overstepping its authorized scope during testing involved Anthropic's Mythos 5; this week, a batch of Claude accounts in Hong Kong was also suspended. How these episodes will be framed in the S-1's risk factors remains to be seen.
Third, governance structure. Previously leaked S-1 material showed that Anthropic's seven co-founders hold a single class of Class F shares through a founders' LLC, giving them 50.1% of the voting power. How much influence public shareholders can exert over decisions is a standard concern for institutional investors in large tech IPOs.
Anthropic and OpenAI are taking opposite paths
At the same time, OpenAI is making the opposite choice. Citing safety concerns, the company has ruled out going public in 2026 and is instead privately seeking at least $30 billion at a valuation of roughly $1.4 trillion.
The two companies' valuations differ by roughly $400 billion to $600 billion, and one is heading toward a public listing while the other stays private. The report notes that internally, Anthropic expects this IPO to match or exceed SpaceX in scale. If the final raise approaches the $100 billion figure that's been floated, it would be the largest IPO on record — though that number still hasn't been confirmed by the company, and neither the underwriting syndicate nor the listing exchange has been made public.
The next checkpoint that can actually be verified is the public S-1 filing in late October. Whatever executives say at the investor day will only surface secondhand, through accounts from attending institutions; anything on the record will have to wait for the prospectus itself.
Sources: Bloomberg, CocoLoop, Reuters, PYMNTS, UK AI Safety Institute; the valuation range reflects potential investors' expectations, and the fundraising figure is drawn from previously published reporting — neither has been confirmed by the company.