Mark the Calendar: Anthropic Sends IPO Invitations, Targets a November 9 Marketing Launch and a Pre-Thanksgiving Trading Debut

The most anticipated stock listing of the AI era now has a calendar. According to a Bloomberg report published October 1, Anthropic has begun sending invitations to investors for its initial public offering, with formal IPO marketing — the roadshow — set to launch as early as the week of November 9. That timing would put the company behind Claude in line to begin trading before the U.S. Thanksgiving holiday on November 26, in what bankers expect could match or exceed the largest IPO on record.

The Timeline Comes Into Focus

Three concrete milestones have now surfaced:

• October 14: Anthropic has scheduled its first formal investor meetings ahead of the possible listing, according to briefs.co — the opening move of the pre-roadshow choreography where management tests its narrative against the sharpest questions institutional money can throw at it.
• Week of November 9: Formal IPO marketing could begin, per Bloomberg, kicking off the roughly two-week sprint of roadshow presentations, order books, and price discovery.
• Before Thanksgiving: Trading could start before the holiday, capping a compressed timeline that leaves little room for the kind of market wobble that kills megadeals.

The November target represents a subtle but meaningful slip. Earlier this year, investors and bankers expected Anthropic to go public as soon as October. As Schwab Network’s Kevin Green noted, the push to November allows the company to present its Q3 2026 numbers — a decision that trades urgency for a fresaher growth story. For a company whose quarterly revenue has been multiplying at double-digit factors, one more quarter of acceleration is arguably worth more than two weeks of calendar advantage.

The Number: $1.8 to $2 Trillion

The valuation question is where this IPO becomes a stress test for the entire AI trade. Prospective investors are pegging a fair valuation for Anthropic at $1.8 trillion to $2 trillion, according to Quartz — a figure that would comfortably make it the largest IPO in history and instantly place the company among the most valuable corporations on Earth on day one.

The trajectory behind that number is vertiginous. Anthropic was last privately marked around $965 billion in July, crossed the $1 trillion pre-IPO threshold within weeks, and is now courting a public debut at nearly double that. Bloomberg reported in September that the company is seeking to raise as much as $100 billion in the offering — with Nvidia reportedly in talks to anchor the deal with an investment of up to $10 billion.

What the Prospectus Already Told Us

The IPO groundwork was laid on September 28, when Reuters reviewed Anthropic’s prospectus and found a company that is simultaneously breathtaking in growth and staggering in cost:

• Revenue: $4.6 billion in 2025, roughly a 12-fold increase year over year — with Q2 2026 revenue reportedly exceeding $11.5 billion in a single quarter, implying an annualized run-rate that investors project could reach $100 to $120 billion by the end of 2026.
• Losses: a $42 billion net loss in 2025, a figure inflated by massive non-cash compensation but underscored by $7.33 billion in pure compute spend.
• Commitments: more than half a trillion dollars in largely non-cancellable compute contracts — the infrastructure mortgage that makes this listing as much a bond-market event as an equity one.
• Related-party gravity: nearly half of Anthropic’s sales flow through arrangements involving Amazon and Google, the same companies that fund it, supply its chips, and host its models.

Any one of these line items would be a red flag at a normal company. At Anthropic, investors are being asked to price them as the ordinary cost of buying the future.

Why Thanksgiving Matters

Barron’s framed the timing as the core strategic question, and it cuts both ways. Listing before Thanksgiving means arriving before year-end window-dressing, holiday-thinned liquidity, and the January repricing that so often follows mega-offerings. It also means Anthropic prices its shares into a market that has spent the autumn absorbing warning shots: the Bank of England governor cautioning that the AI boom’s losers will be “wiped out,” an emerging wave of low-rated AI infrastructure debt yielding as much as 14%, and Treasury yields pressing on the valuations of every long-duration asset.

The competitive backdrop adds urgency. OpenAI is reportedly in talks to raise at least $30 billion at a $1.4 trillion valuation in its own pre-IPO round — and both companies know that whoever completes the first true frontier-lab listing will set the reference price for everyone after. Anthropic going first at $2 trillion would, in one print, reprice the private marks of half the industry.

What to Watch

1. October 14 meetings — the first read on how institutional investors receive the growth-versus-burn narrative in person.
2. The Q3 earnings reveal — the numbers that justified the October-to-November delay need to show the hypergrowth curve holding.
3. Nvidia’s anchor decision — a $10 billion commitment from the chip supplier at the center of the compute buildout would be the strongest possible signal of insider conviction.
4. The roadshow price range — watch whether bankers dare file at the top of the $1.8–2 trillion band or hedge toward the middle.

Deliberations remain ongoing and the timeline could still shift, as Bloomberg’s sources caution. But for the first time since this IPO became inevitable, it is no longer a question of whether or even how much — it is now, concretely, a question of when. And the answer appears to be: before the turkey is carved.