Will Anthropic file a Form S-1 with the SEC by 30 November 2026?

probability 80% deadline 2026-11-30 (40d left) Finance

Posted 2026-10-13 — 48 days before the deadline, stated before the outcome.

Anthropic is an artificial intelligence company that develops large language models. A Form S-1 is a registration statement filed with the U.S. Securities and Exchange Commission as a standard step in preparing for a public stock offering.

The claim

Anthropic publicly files a Form S-1 registration statement with the U.S. SEC (visible on EDGAR) by 2026-11-30.

Reasoning trace

Base rate: U.S. tech companies that hold pre-IPO investor meetings and target a listing within ~7 weeks file a public S-1 with the SEC before pricing ≈ 75%
Anthropic is holding an investor meeting on Oct 14 to disclose Q3 financials and is reportedly preparing the largest IPO in history, with an open prediction of a Dec 4 listing; a public S-1 by late November is the standard observable step on that path.

Evidence so far

18 confirming · 0 denying signals · 7 verified · 2 broken assumptions. The evidence itself is part of the full dossier.

Probability history

Updated 15 times since mint (last on 2026-10-20) — 58% at mint → 80% today.

What to watch

leading indicator Anthropic's lead underwriters (e.g., banks) publicly announce their role in the IPO observed
milestone Anthropic issues a public press release or news article confirming the date and agenda of the private investor meeting where Q3 2026 financials will be presented. observed
leading indicator A major financial news outlet (e.g., CNBC, Bloomberg) publishes an article reporting that Anthropic has shared or is about to share specific Q3 2026 revenue or EBITDA figures with investors. observed

The full dossier behind this prediction — the evidence trail, the risk analysis, the monetization scenarios — is available on request: [email protected].

Probabilities are calibrated against the system's own resolved history; after the deadline the outcome is resolved and audited — including the calls we get wrong. Nothing on this page is investment advice.