Will Anthropic complete its IPO before December 31, 2026?

Earlier updates

The chart shows each outcome’s published likelihood, including its baseline and news adjustment at that time.

1. Sep 19, 2026 UTC — IPO process shows signs of delay, but completion within the year remains possible; Anthropic's IPO process presented conflicting signals this week. On one hand, the company has confidentially filed its listing paperwork and selected Nasdaq, with pre-IPO markets valuing it at $2.15 trillion, reflecting strong anticipation. On the other hand, Reuters, citing multiple sources, reported that the company is considering launching a new AI model before its IPO and may delay the listing until after the U.S. midterm elections in November. This discussion of a delay contrasts with Reuters' earlier report that the roadshow could start as early as mid-October, indicating uncertainty in the timeline. The baseline likelihood is 79.5%, reflecting high market confidence in a 2026 IPO. Based on the latest delay news, the news evidence adjustment lowered the probability by 5 percentage points, bringing the final probability from 79.5% to 74.5%, a change of -5.0 pp.
2. Sep 19, 2026 UTC — IPO process continues to advance, but valuation risks draw market attention; Anthropic's IPO process continues to advance this week, with the company having confidentially filed its paperwork and selected Nasdaq, targeting a valuation of up to $2 trillion. However, a Yahoo Finance analysis highlights that SpaceX lost $1 trillion in market value after its IPO due to massive AI infrastructure spending, casting a shadow over Anthropic's IPO prospects as investors may be cautious about its undisclosed capital expenditures. The baseline likelihood has edged down from 79.5% to 76.0%, reflecting slightly cooled market confidence in a 2026 IPO. The current news evidence does not provide new information to alter this trend, so the baseline likelihood is maintained.
3. Sep 20, 2026 UTC — IPO timeline faces uncertainty with reports of a potential delay until after the November midterm elections; This period saw conflicting signals on Anthropic's IPO timeline. Euronews confirmed the company has confidentially filed and selected Nasdaq, with pre-IPO market valuation exceeding $2 trillion, suggesting steady progress. However, two reports from Cailian Press indicated Anthropic may delay its IPO until after the US November midterm elections, as it considers launching a new AI model to counter competitive pressure from OpenAI's GPT-6 Astra, with some investors reassessing its enterprise market position. The baseline likelihood remained unchanged at 72.5%, but the delay reports introduce new downside risk, warranting a -3 percentage point news evidence adjustment. The final probability fell from the previous period's 76% to 69.5%, a decline of 6.5 percentage points.
4. Sep 21, 2026 UTC — IPO timeline signals are mixed, with reports of an October listing and a delay until after the midterm elections coexisting; This period saw conflicting signals regarding Anthropic's IPO timeline. Two reports from Jiemian News (indices 1, 2) both stated that Anthropic is 'expected to go public as early as October' at a valuation of around $2 trillion, providing positive evidence for a near-term listing. However, daily AI digests from Jin10 and other sources (indices 3, 4, 5) cited sources saying the IPO 'may be delayed until after the US midterm elections,' introducing new uncertainty. The baseline likelihood rose from 72.5% to 77%, a 4.5 percentage point increase, suggesting the market has grown more optimistic about the listing prospects. Given that the news evidence contains both reports supporting an October window and clues pointing to a delay, the overall signal is balanced, so no news evidence adjustment is applied.
5. Sep 22, 2026 UTC — IPO timeline firms up, with November window becoming the consensus expectation; This period saw a convergence in reporting on Anthropic's IPO timeline. Multiple reports (indices 1, 3, 4, 6, 7, 9, 10) indicate the IPO has been pushed from October to November, with the most authoritative accounts coming from The New York Times and The Wall Street Journal. Reasons cited include showcasing third-quarter financials and responding to competition from OpenAI. While some reports mention a potential delay until after the midterm elections (indices 2, 5, 8), the November window already encompasses this timeframe. The baseline likelihood edged up from 77% to 77.5%, a minimal change suggesting the market has largely absorbed the November listing news. The evidence overall supports a 2026 IPO, but with the baseline already elevated and no breakthrough developments, no news evidence adjustment is applied.
6. Sep 23, 2026 UTC — IPO timeline holds at November window, no new developments; During this period, reports on Anthropic's IPO reiterated information already seen in prior cycles, with no material new developments. Multiple reports (indices 1, 3, 4, 6, 7, 9, 10) reaffirmed the timeline shift from October to November, with the New York Times and Wall Street Journal providing the most authoritative backing. Some reports (indices 2, 5, 8) mentioned a potential delay until after the US midterm elections, but the November window already encompasses that timeframe. The baseline likelihood held steady at 77.5%, unchanged from the prior period, indicating the market has fully absorbed existing information. With no breakthrough news, the previous judgment is maintained and no news evidence adjustment is applied.
7. Sep 24, 2026 UTC — IPO timeline holds at November window, no new developments; During this period, reports on Anthropic's IPO repeated information already seen in previous cycles, with no new substantive developments. Multiple reports (indices 0, 2, 3, 5, 6, 8, 9) reiterated the IPO timeline shift from October to November, with the New York Times and Wall Street Journal providing the most authoritative backing. Some reports (indices 1, 4, 7, 10) mentioned a possible delay until after the US midterm elections, but the November window already encompasses this timing. The baseline likelihood held steady at 77.5%, unchanged from the prior period, indicating the market has fully absorbed existing information. With no breakthrough news, the previous judgment is maintained and no news evidence adjustment is applied.
8. Sep 25, 2026 UTC — IPO timeline holds at November window, no new developments; During this period, reports on Anthropic's IPO all contained information that had already surfaced in previous cycles, with no new substantive developments. Multiple reports (indices 0, 2, 3, 5, 6, 8, 9) reiterated the IPO timeline delay from October to November, with the New York Times and Wall Street Journal providing the most authoritative confirmation. Some reports (indices 1, 4, 7, 10) mentioned a potential delay until after the US midterm elections, but the November window already encompasses this timing. The baseline likelihood remains at 77.5%, unchanged from the previous cycle, indicating the market has fully absorbed existing information. Given the absence of breaking news, the previous judgment is maintained with no news evidence adjustment.
9. Sep 26, 2026 UTC — IPO timeline holds at November window, no new developments; During this period, reports on Anthropic's IPO reiterated information that had already surfaced in prior cycles, with no new substantive developments. Multiple reports (indices 0, 1, 3, 4, 5) reaffirmed the timeline shift from October to November, with the most authoritative backing coming from the Wall Street Journal report cited in index 4 and the Sina Finance report in index 5. Some reports (indices 0, 1, 4) mentioned a potential delay until after the U.S. midterm elections, but the November window already encompasses this timing. The baseline likelihood remains at 77.5%, unchanged from the previous cycle, indicating the market has fully absorbed existing information. Given the absence of breaking news, the previous judgment is maintained with no news evidence adjustment.
10. Sep 27, 2026 UTC — IPO preparations advance, November window holds firm, but no definitive date breakthrough; This period saw new, substantive developments in Anthropic's IPO preparations. The most notable signal is that the company is seeking shareholder approval to grant its seven co-founders 50.1% voting control (indices 7, 8), a classic pre-IPO governance arrangement indicating the process has entered a critical phase. Concurrently, the company launched its new Claude Opus 5.5 model (index 6), aiming to maintain a competitive edge at lower cost as it paves the way for its listing. These actions reinforce the credibility of the November IPO window, though no report provided a specific listing date. The baseline likelihood remains at 77.5%, unchanged from the prior period, suggesting the market views these preparatory steps as expected. As the new evidence solidifies the existing timeline without a breakthrough, the prior judgment is maintained with no news evidence adjustment.