Update, 6 Nov, 21:58 UTC: Kalshi eases to 82 cents. Kalshi’s “Before Dec 1, 2026” contract, which resolves Yes “if Anthropic confirms an IPO before Dec 1, 2026”, last traded at 82 cents at 21:58 UTC, with a bid of 82 and an ask of 83 cents, according to Kalshi’s public market data. That is 3 points below the 85 cents reported above and 18 points above the contract’s previous price of 64 cents, by our arithmetic. The Financial Times’ reported $1.25T–$1.75T valuation range is covered in our piece on Anthropic pressing on with its IPO. These are traders’ prices, not forecasts.
Polymarket priced the chance that Anthropic lists its shares by 30 November at 76% at 21:15 UTC on 6 November, up from 59% at 20:30 UTC and from 54% at 14:37 UTC, according to Polymarket’s public market data. That is a rise of 22 percentage points from the afternoon read, by our arithmetic, after the contract fell from 86.5% on 4 November to 50.5% at 09:00 UTC on Friday.
The move came around the time the Financial Times reported, as summarised by Techmeme at about 21:12 UTC, that “Anthropic is continuing with plans to list before the Thanksgiving holiday this month, expecting to raise $80B-$100B at a valuation of $1.25T to $1.75T”, citing sources. The market data do not show why traders moved, and the timing alone does not establish a cause.
Business Pill · Financial Conditions Explained
A short explainer on financial conditions, how the price and availability of money move markets. It teaches the general idea only and does not discuss this story.
The key insight: As we read the exchanges’ own data, Polymarket’s price for an Anthropic listing by 30 November rose to 76% at 21:15 UTC from 54% at 14:37 UTC, a 22-point rebound by our arithmetic, around the time the Financial Times reported that Anthropic is continuing with plans to list before Thanksgiving.
On Polymarket’s IPO-by-date market, “Will Anthropic IPO by November 30, 2026?” showed a Yes price of 0.76 at 21:15 UTC. The order book was wide: the best bid was 0.71 and the best ask 0.81, a 10-point spread, and the last trade was 0.82. About $42,910 traded on the contract in the past 24 hours, according to Polymarket’s data.
The year-end contract, “Will Anthropic IPO by December 31, 2026?”, rose to 88.2% at 21:13 UTC from 69.45% at 21:00 UTC, with a much tighter book, bid 0.878 and ask 0.886. Earlier on 6 November it had stood at 71.75% at 14:37 UTC.
On Kalshi, the event “When will Anthropic officially announce an IPO?” showed 85 cents for “Before Dec 1, 2026” at 21:15 UTC, with bid 86 and ask 87 cents, against a previous price of 59 cents. At 14:3x UTC the same contract had a last price of 57 cents. “Before Nov 16, 2026” showed 8 cents.
Anthropic IPO odds at 14:37 UTC and 21:15 UTC on 6 November 2026: Polymarket IPO by 30 November 54% to 76%, Polymarket IPO by 31 December 71.75% to 88.2% (21:13 UTC), Kalshi official announcement before 1 December 57 cents to 85 cents, from the exchanges’ public market data. Point changes are our arithmetic. These are traders’ prices, not forecasts.
As we read the half-hourly history, the November contract sat at 59% at 20:30 UTC and printed 76% by 21:13 UTC, so most of the move came within about 45 minutes.
As we read the order book, the November contract’s bid was 0.71 and its ask 0.81, a 10-point spread, while the year-end contract traded in a book less than one point wide at about 88%.
As we read the two venues together, Kalshi’s “Before Dec 1, 2026” contract moved the same way, to 85 cents from a previous price of 59 cents, though it asks about an official announcement rather than the listing itself.
Polymarket market question, 6 November 2026
“Will Anthropic IPO by November 30, 2026?”
Three Implications
FOR TRADERS About $42,910 traded on the November contract in the past 24 hours, according to Polymarket’s data.
FOR THE VALUATION DEBATE The Financial Times range, as summarised by Techmeme, is $1.25 trillion to $1.75 trillion, with $80 billion to $100 billion to be raised.
FOR THE CALENDAR Kalshi’s “Before Nov 16, 2026” contract showed 8 cents.
The analysis says: “Conflating these clocks produces the most common analytical errors of the moment.”
As we read it, prediction-market odds run on the fastest clock of all: they cut and then rebuilt a listing date within a single day. The analysis does not discuss Anthropic’s IPO or these markets.
What Is Not Established
Prediction-market prices are bets by traders, not forecasts by Anthropic, its bankers or this publication. We have not read the Financial Times article itself; its content here is as summarised in Techmeme’s headline, and we did not contact Anthropic. The November contract’s wide spread means its quoted price could move on small trades. Kalshi’s contract asks about an official announcement, not the same event as Polymarket’s listing question. All point changes are our arithmetic from the exchanges’ own data.
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Polymarket priced a listing by 30 November at 76% at 21:15 UTC on 6 November, 22 points above the afternoon’s 54% by our arithmetic, after a Financial Times report that Anthropic is sticking with a pre-Thanksgiving listing. The order book on that contract was 10 points wide.
A note on sourcing. All odds are from Polymarket’s and Kalshi’s own public market data, queried between 21:12 and 21:15 UTC on 6 November 2026, including Polymarket’s half-hourly price history; earlier readings are from our 6 November piece. The Financial Times report is as summarised in Techmeme’s headline; we did not read the FT article. Prediction-market prices are traders’ bets, not forecasts by Anthropic or by this publication. Point changes are our arithmetic. We did not contact Anthropic, Polymarket or Kalshi.
Gennaro Cuofano is a CRO and tech executive who has worked in AI since late 2015, starting with bringing NLP, natural-language generation, voice and chatbot products to the marketing industry. His background is in law and finance: he holds a Master's degree in Law and an International MBA with an emphasis on corporate finance (LUISS Business School and the University of San Diego, 2012), and worked as a financial analyst at a real-estate investment firm in San Diego and as an assistant controller. His work focuses on business model strategy, business engineering and, more broadly, structural analysis: how companies make money, read from their own filings. He created FourWeekMBA and leads research there and at The Business Engineer, his newsletter on AI and business strategy, with over 95,000 subscribers and more than 1,000 published analyses. His writing has also appeared on Entrepreneur (for example, How to Digitize a Family Business in Europe) and HackerNoon. Find him on LinkedIn and Substack. See how we source.
